chore: remove packages/typescript/smoke-tests — fully replaced by testing/e2e

The smoke-tests E2E suite and adapters package have been fully consolidated
into the new testing/e2e/ infrastructure:

- E2E tests: all 29 smoke-test specs (chat, approval, client tools, race
  conditions, server-client sequences) now live in testing/e2e/tests/tools-test/
- Adapter tests: all features (chat, one-shot, tool-calling, structured output,
  multimodal, summarize, etc.) covered by testing/e2e/ provider-coverage tests
- LLM simulator: replaced by aimock fixtures across all test scenarios

Also:
- Remove packages/typescript/smoke-tests/* from pnpm-workspace.yaml
- Remove smoke-tests entries from knip.json
- Update scripts/distribute-keys.ts to use testing/e2e/.env.local
- Update testing/e2e/README.md to remove LLM simulator references

Author: AlemTuzlak

knip.json

@@ -4,7 +4,6 @@
   "ignoreWorkspaces": [
     "examples/**",
     "testing/**",
-    "**/smoke-tests/**",
     "packages/typescript/ai-code-mode/models-eval"
   ],
   "ignore": [
@@ -16,10 +15,6 @@
     "packages/typescript/ai-openai/src/audio/audio-provider-options.ts",
     "packages/typescript/ai-openai/src/audio/transcribe-provider-options.ts",
     "packages/typescript/ai-openai/src/image/image-provider-options.ts",
-    "packages/typescript/smoke-tests/adapters/src/**",
-    "packages/typescript/smoke-tests/e2e/playwright.config.ts",
-    "packages/typescript/smoke-tests/e2e/src/**",
-    "packages/typescript/smoke-tests/e2e/vite.config.ts",
     "packages/typescript/ai-devtools/src/production.ts"
   ],
   "ignoreExportsUsedInFile": true,