Move evalbuff from evals/ to top-level package

Evalbuff is now its own workspace package (@codebuff/evalbuff) instead of
a subdirectory of evals. Adds package.json, tsconfig.json, and updates
workspace config. All 42 tests pass from the new location.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: jahooma

bun.lock

@@ -0,0 +1,21 @@
+{
+  "name": "@codebuff/evalbuff",
+  "version": "1.0.0",
+  "description": "Automated docs optimization loop: run agent → judge → analyze failures → propose doc edits",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "typecheck": "tsc --noEmit -p .",
+    "test": "bun test src/__tests__/criteria.test.ts src/__tests__/docs-optimizer.test.ts src/__tests__/morning-report.test.ts src/__tests__/cli-runner.test.ts && bun test src/__tests__/loop.integration.test.ts && bun test src/__tests__/e2e.test.ts",
+    "test:unit": "bun test src/__tests__/criteria.test.ts src/__tests__/docs-optimizer.test.ts src/__tests__/morning-report.test.ts src/__tests__/cli-runner.test.ts",
+    "test:integration": "bun test src/__tests__/loop.integration.test.ts",
+    "test:e2e": "bun test src/__tests__/e2e.test.ts",
+    "test:e2e-real": "bun run src/run-e2e-test.ts",
+    "run": "bun run src/run-evalbuff.ts"
+  },
+  "dependencies": {
+    "@codebuff/common": "workspace:*",
+    "@codebuff/sdk": "workspace:*",
+    "zod": "^4.2.1"
+  }
+}

evalbuff/package.json

@@ -11,7 +11,7 @@
  * This test uses mock.module to replace LLM calls but runs the full
  * orchestrator, CLI runner, and git operations for real.
  *
- * Run: bun test evals/evalbuff/__tests__/e2e.test.ts
+ * Run: bun test evalbuff/src/__tests__/e2e.test.ts
  */
 import { execSync } from 'child_process'
 import fs from 'fs'