chore: rebrand companion-os to clanker-agent

- Rename all package names from companion-* to clanker-*
- Update npm scopes from @mariozechner to @harivansh-afk
- Rename config directories .companion -> .clanker
- Rename environment variables COMPANION_* -> CLANKER_*
- Update all documentation, README files, and install scripts
- Rename package directories (companion-channels, companion-grind, companion-teams)
- Update GitHub URLs to harivansh-afk/clanker-agent
- Preserve full git history from companion-cloud monorepo

packages/coding-agent/docs/development.md

@@ -5,8 +5,8 @@ See [AGENTS.md](../../../AGENTS.md) for additional guidelines.
 ## Setup
 
 ```bash
-git clone https://github.com/badlogic/companion-mono
-cd companion-mono
+git clone https://github.com/badlogic/clanker-agent
+cd clanker-agent
 npm install
 npm run build
 ```
@@ -14,7 +14,7 @@ npm run build
 Run from source:
 
 ```bash
-./companion-test.sh
+./clanker-test.sh
 ```
 
 ## Forking / Rebranding
@@ -23,9 +23,9 @@ Configure via `package.json`:
 
 ```json
 {
-  "companionConfig": {
-    "name": "companion",
-    "configDir": ".companion"
+  "clankerConfig": {
+    "name": "clanker",
+    "configDir": ".clanker"
   }
 }
 ```
@@ -46,7 +46,7 @@ Never use `__dirname` directly for package assets.
 
 ## Debug Command
 
-`/debug` (hidden) writes to `~/.companion/agent/companion-debug.log`:
+`/debug` (hidden) writes to `~/.clanker/agent/clanker-debug.log`:
 
 - Rendered TUI lines with ANSI codes
 - Last messages sent to the LLM