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/test/sdk-skills.test.ts

@@ -14,12 +14,12 @@ describe("createAgentSession skills option", () => {
   beforeEach(() => {
     tempDir = join(
       tmpdir(),
-      `companion-sdk-test-${Date.now()}-${Math.random().toString(36).slice(2)}`,
+      `clanker-sdk-test-${Date.now()}-${Math.random().toString(36).slice(2)}`,
     );
     skillsDir = join(tempDir, "skills", "test-skill");
     mkdirSync(skillsDir, { recursive: true });
 
-    // Create a test skill in the companion skills directory
+    // Create a test skill in the clanker skills directory
     writeFileSync(
       join(skillsDir, "SKILL.md"),
       `---