chore: migrate docs site to core.help, strip Lethean brand refs

- public/CNAME: dappco.re → core.help
- astro.config.mjs: site URL, title, description updated; comment notes
  legacy dappco.re origin; go-import/go-source meta unchanged (Task #33)
- Footer.astro: drop lthn.ai/lthn.io links; neutral dappcore GitHub links;
  lineage note "formerly at dappco.re"
- index.mdx: de-brand hero; remove SDKGrid (Lethean SDK tiles); keep
  go-get lineage note in card copy
- go/agent.mdx, go/ml.mdx: description fields → "Core framework"

dappco.re import paths in go/*.mdx and public/ go-get redirects are
technical identifiers, not brand refs — untouched (Task #33 scope).

Co-Authored-By: Virgil <virgil@lethean.io>

Author: Snider

astro.config.mjs

@@ -2,18 +2,18 @@
 import { defineConfig } from 'astro/config';
 import starlight from '@astrojs/starlight';
 
-// dappco.re — docs for the dappcore Go ecosystem.
+// core.help — docs for the Core Go framework (formerly at dappco.re).
 //
-// Static site, served at https://dappco.re/. Existing per-package go-get
+// Static site, served at https://core.help/. Existing per-package go-get
 // redirect HTML lives in `public/<pkg>/index.html` and is served untouched;
 // Starlight content under `src/content/docs/` overrides any matching path
 // once written. Migration is one package at a time.
 export default defineConfig({
-	site: 'https://dappco.re',
+	site: 'https://core.help',
 	integrations: [
 		starlight({
-			title: 'dappco.re',
-			description: 'Zero-dependency Go primitives for the dappcore ecosystem.',
+			title: 'Core',
+			description: 'Zero-dependency Go primitives for the Core framework.',
 			social: [
 				{ icon: 'github', label: 'GitHub', href: 'https://github.com/dappcore/go' },
 			],

public/CNAME

@@ -1 +1 @@
-dappco.re
+core.help

src/components/Footer.astro

@@ -6,13 +6,11 @@ import Default from '@astrojs/starlight/components/Footer.astro';
 
 <footer class="site-footer">
 	<div class="links">
-		<a href="https://lthn.ai/" rel="noopener">lthn.ai</a>
-		<span class="dot" aria-hidden="true">·</span>
-		<a href="https://lthn.io/" rel="noopener">lthn.io</a>
-		<span class="dot" aria-hidden="true">·</span>
 		<a href="https://github.com/dappcore/go" rel="noopener">github.com/dappcore/go</a>
+		<span class="dot" aria-hidden="true">·</span>
+		<a href="https://github.com/dappcore" rel="noopener">dappcore</a>
 	</div>
-	<div class="meta">EUPL-1.2 · part of the dAppCore ecosystem</div>
+	<div class="meta">EUPL-1.2 · Core framework · formerly at dappco.re</div>
 </footer>
 
 <style>

src/content/docs/go/agent.mdx

@@ -1,6 +1,6 @@
 ---
 title: agent
-description: Agent runtime for the dappcore ecosystem — dispatch, sessions, fleets, plans.
+description: Agent runtime for the Core framework — dispatch, sessions, fleets, plans.
 head:
   - tag: meta
     attrs:

src/content/docs/go/ml.mdx

@@ -1,6 +1,6 @@
 ---
 title: ml
-description: Multi-suite scoring engine + agent orchestrator for the Lethean AI stack.
+description: Multi-suite scoring engine + agent orchestrator for the Core framework.
 head:
   - tag: meta
     attrs:

src/content/docs/index.mdx

@@ -1,9 +1,9 @@
 ---
-title: dappco.re
-description: Zero-dependency Go primitives for the dappcore ecosystem.
+title: Core
+description: Zero-dependency Go primitives for the Core framework.
 template: splash
 hero:
-  tagline: Zero-dependency Go primitives for the dappcore ecosystem. Result everywhere, Options for input, Action for capability, Core as the fractal root. Designed to be read by AI agents as easily as humans.
+  tagline: Zero-dependency Go primitives. Result everywhere, Options for input, Action for capability, Core as the fractal root. Designed to be read by AI agents as easily as humans.
   actions:
     - text: Get started — core/go
       link: /go/
@@ -15,7 +15,6 @@ hero:
 ---
 
 import { Card, CardGrid } from '@astrojs/starlight/components';
-import SDKGrid from '../../components/SDKGrid.astro';
 
 ## What ships today
 
@@ -31,5 +30,3 @@ import SDKGrid from '../../components/SDKGrid.astro';
 		human-facing docs surface lights up incrementally.
 	</Card>
 </CardGrid>
-
-<SDKGrid />