refactor(rfcs): centralize RFC sidebar and source metadata (#205)

## Summary
<!-- What has been updated and why -->
This PR centralizes published RFC metadata in src/data/rfcs.ts so it can
act as the single source of truth for RFC routes, titles, and raw source
URLs.

The Starlight sidebar in astro.config.mjs now derives its RFC entries
from that shared data instead of duplicating each label and link inline.
The RFC MDX pages under src/content/docs/rfcs were also updated to
resolve their Rfc component source prop via getRfcById(...) rather than
hardcoded GitHub raw URLs. This reduces repetition and keeps sidebar
navigation and RFC page sources aligned from one place.

Author: JoblersTune

astro.config.mjs

@@ -4,6 +4,7 @@ import starlightLinksValidator from 'starlight-links-validator'
 import starlightFullViewMode from 'starlight-fullview-mode'
 
 import mdx from '@astrojs/mdx'
+import { PUBLISHED_RFC_SIDEBAR_ITEMS } from './src/data/rfcs.ts'
 
 // https://astro.build/config
 export default defineConfig({
@@ -73,50 +74,7 @@ export default defineConfig({
         {
           label: 'Specifications',
           items: [
-            {
-              label: 'Interledger Protocol V4 (ILPv4)',
-              link: '/rfcs/interledger-protocol'
-            },
-            {
-              label: 'Interledger Architecture',
-              link: '/rfcs/interledger-architecture'
-            },
-            {
-              label: 'Interledger Addresses',
-              link: '/rfcs/ilp-addresses'
-            },
-            {
-              label: 'STREAM Protocol',
-              link: '/rfcs/stream-protocol'
-            },
-            {
-              label: 'Simple Payment Setup Protocol (SPSP)',
-              link: '/rfcs/simple-payment-setup-protocol'
-            },
-            {
-              label: 'Peering, Clearing and Settling',
-              link: '/rfcs/peering-clearing-settling'
-            },
-            {
-              label: 'Settlement Engines',
-              link: '/rfcs/settlement-engines'
-            },
-            {
-              label: 'ILP Over HTTP',
-              link: '/rfcs/ilp-over-http'
-            },
-            {
-              label: 'Bilateral Transfer Protocol',
-              link: '/rfcs/bilateral-transfer-protocol'
-            },
-            {
-              label: 'Dynamic Configuration Protocol',
-              link: '/rfcs/dynamic-configuration-protocol'
-            },
-            {
-              label: 'Hashed-Timelock Agreements',
-              link: '/rfcs/hashed-timelock-agreements'
-            },
+            ...PUBLISHED_RFC_SIDEBAR_ITEMS,
             {
               label: 'Payment Pointers',
               link: 'https://paymentpointers.org',

src/content/docs/rfcs/bilateral-transfer-protocol.mdx

@@ -3,8 +3,9 @@ title: Bilateral Transfer Protocol
 ---
 
 import Rfc from '/src/components/Rfc.astro'
+import { getRfcById } from '/src/data/rfcs'
 
-<Rfc source="https://raw.githubusercontent.com/interledger/rfcs/main/0023-bilateral-transfer-protocol/0023-bilateral-transfer-protocol.md">
+<Rfc source={getRfcById('bilateral-transfer-protocol').sourceRawUrl}>
 
 ## Prerequisites
 

src/content/docs/rfcs/dynamic-configuration-protocol.mdx

@@ -3,8 +3,9 @@ title: Dynamic Configuration Protocol
 ---
 
 import Rfc from '/src/components/Rfc.astro'
+import { getRfcById } from '/src/data/rfcs'
 
-<Rfc source="https://raw.githubusercontent.com/interledger/rfcs/master/0031-dynamic-configuration-protocol/0031-dynamic-configuration-protocol.md">
+<Rfc source={getRfcById('dynamic-configuration-protocol').sourceRawUrl}>
 
 ## Prerequisites
 

src/content/docs/rfcs/hashed-timelock-agreements.mdx

@@ -3,8 +3,9 @@ title: Hashed-Timelock Agreements
 ---
 
 import Rfc from '/src/components/Rfc.astro'
+import { getRfcById } from '/src/data/rfcs'
 
-<Rfc source="https://raw.githubusercontent.com/interledger/rfcs/main/0022-hashed-timelock-agreements/0022-hashed-timelock-agreements.md">
+<Rfc source={getRfcById('hashed-timelock-agreements').sourceRawUrl}>
 
 ## Background on Hashed-Timelock Contracts (HTLCs)
 

src/content/docs/rfcs/ilp-addresses.mdx

@@ -3,8 +3,9 @@ title: ILP Addresses - v2.0.0
 ---
 
 import Rfc from '/src/components/Rfc.astro'
+import { getRfcById } from '/src/data/rfcs'
 
-<Rfc source="https://raw.githubusercontent.com/interledger/rfcs/master/0015-ilp-addresses/0015-ilp-addresses.md">
+<Rfc source={getRfcById('ilp-addresses').sourceRawUrl}>
 
 ## Routing
 

src/content/docs/rfcs/ilp-over-http.mdx

@@ -3,8 +3,9 @@ title: ILP Over HTTP
 ---
 
 import Rfc from '/src/components/Rfc.astro'
+import { getRfcById } from '/src/data/rfcs'
 
-<Rfc source="https://raw.githubusercontent.com/interledger/rfcs/master/0035-ilp-over-http/0035-ilp-over-http.md">
+<Rfc source={getRfcById('ilp-over-http').sourceRawUrl}>
 
 ## Motivation
 

src/content/docs/rfcs/interledger-architecture.mdx

@@ -3,8 +3,9 @@ title: Interledger Architecture
 ---
 
 import Rfc from '/src/components/Rfc.astro'
+import { getRfcById } from '/src/data/rfcs'
 
-<Rfc source="https://raw.githubusercontent.com/interledger/rfcs/master/0001-interledger-architecture/0001-interledger-architecture.md">
+<Rfc source={getRfcById('interledger-architecture').sourceRawUrl}>
 
 ## Core Concepts
 

src/content/docs/rfcs/interledger-protocol.mdx

@@ -4,8 +4,9 @@ prev: false
 ---
 
 import Rfc from '/src/components/Rfc.astro'
+import { getRfcById } from '/src/data/rfcs'
 
-<Rfc source="https://raw.githubusercontent.com/interledger/rfcs/master/0027-interledger-protocol-4/0027-interledger-protocol-4.md">
+<Rfc source={getRfcById('interledger-protocol').sourceRawUrl}>
 
 ## Flow
 

src/content/docs/rfcs/peering-clearing-settling.mdx

@@ -3,8 +3,9 @@ title: Peering, Clearing and Settling
 ---
 
 import Rfc from '/src/components/Rfc.astro'
+import { getRfcById } from '/src/data/rfcs'
 
-<Rfc source="https://raw.githubusercontent.com/interledger/rfcs/master/0032-peering-clearing-settlement/0032-peering-clearing-settlement.md">
+<Rfc source={getRfcById('peering-clearing-settling').sourceRawUrl}>
 
 ## Accounts and Balances
 

src/content/docs/rfcs/settlement-engines.mdx

@@ -3,8 +3,9 @@ title: Settlement Engines
 ---
 
 import Rfc from '/src/components/Rfc.astro'
+import { getRfcById } from '/src/data/rfcs'
 
-<Rfc source="https://raw.githubusercontent.com/interledger/rfcs/master/0038-settlement-engines/0038-settlement-engines.md">
+<Rfc source={getRfcById('settlement-engines').sourceRawUrl}>
 
 ## Motivation