fix(docs): update plugin version to 5.1.0 and add marketplace install steps

- Fix plugin README version: 4.5.0 → 5.1.0
- Add marketplace add step before plugin install (correct order)
- Root README: expand plugin section with marketplace-first flow
- Add PT-BR, DE, FR to language config options

Author: JeremyDev87

README.md

@@ -73,10 +73,14 @@ Start coding with `PLAN`, `ACT`, `EVAL`, or `AUTO` keywords.
 > **Claude Code users**: Install as a plugin for the full experience:
 >
 > ```bash
+> # 1. Add marketplace
+> claude marketplace add JeremyDev87/codingbuddy
+>
+> # 2. Install plugin
 > claude plugin install codingbuddy@jeremydev87
 > ```
 >
-> The plugin adds session-aware hooks that power Impact Reports, buddy greetings, onboarding tours, achievement badges, and adaptive performance mode. Update to the latest version with the same command.
+> The plugin adds session-aware hooks that power Impact Reports, buddy greetings, onboarding tours, achievement badges, and adaptive performance mode. Update to the latest version with `claude plugin install codingbuddy@jeremydev87`.
 >
 > See the [Plugin Guide](docs/plugin-guide.md) for details.
 

packages/claude-code-plugin/README.md

@@ -2,18 +2,18 @@
 
 # CodingBuddy Claude Code Plugin
 
-> Version 4.5.0
+> Version 5.1.0
 
-Multi-AI Rules for consistent coding practices - PLAN/ACT/EVAL workflow, specialist agents, and reusable skills for systematic development.
+Multi-AI Rules for consistent coding practices - PLAN/ACT/EVAL workflow, specialist agents, Impact Telemetry, and reusable skills for systematic development.
 
 ## Installation
 
 ```bash
-# Via npm
-npm install codingbuddy-claude-plugin
+# 1. Add marketplace
+claude marketplace add JeremyDev87/codingbuddy
 
-# Or via Claude Code
-claude plugin add codingbuddy
+# 2. Install plugin
+claude plugin install codingbuddy@jeremydev87
 ```
 
 ## Features