chore: initial backup of Claude Code configuration

Includes: CLAUDE.md, settings.json, agents, commands, rules, skills,
hooks, contexts, evals, get-shit-done, plugin configs (installed list
and marketplace sources). Excludes credentials, runtime caches,
telemetry, session data, and plugin binary cache.

rules/typescript/testing.md

@@ -0,0 +1,18 @@
+---
+paths:
+  - "**/*.ts"
+  - "**/*.tsx"
+  - "**/*.js"
+  - "**/*.jsx"
+---
+# TypeScript/JavaScript Testing
+
+> This file extends [common/testing.md](../common/testing.md) with TypeScript/JavaScript specific content.
+
+## E2E Testing
+
+Use **Playwright** as the E2E testing framework for critical user flows.
+
+## Agent Support
+
+- **e2e-runner** - Playwright E2E testing specialist