fix(treeshake-check): correct dist paths and clean up publish files

- Fix exports/main/types/bin to point to dist/index.js (not dist/src/)
- Exclude tsbuildinfo and test-setup from published files
- Exclude test-setup.ts from lib build
- Reduces pack size from 59KB to 12.5KB

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: ryanbas21

packages/treeshake-check/package.json

@@ -6,19 +6,21 @@
   "type": "module",
   "exports": {
     ".": {
-      "types": "./dist/src/index.d.ts",
-      "import": "./dist/src/index.js",
-      "default": "./dist/src/index.js"
+      "types": "./dist/index.d.ts",
+      "import": "./dist/index.js",
+      "default": "./dist/index.js"
     },
     "./package.json": "./package.json"
   },
-  "main": "./dist/src/index.js",
-  "types": "./dist/src/index.d.ts",
+  "main": "./dist/index.js",
+  "types": "./dist/index.d.ts",
   "bin": {
-    "treeshake-check": "./dist/src/index.js"
+    "treeshake-check": "./dist/index.js"
   },
   "files": [
-    "dist"
+    "dist",
+    "!dist/test-setup.*",
+    "!dist/*.tsbuildinfo"
   ],
   "scripts": {
     "build": "tsc -p tsconfig.lib.json",

packages/treeshake-check/tsconfig.lib.json

@@ -18,5 +18,5 @@
   },
   "include": ["src/**/*.ts"],
   "references": [],
-  "exclude": ["vitest.config.mts", "src/**/*.test.ts", "src/**/*.spec.ts"]
+  "exclude": ["vitest.config.mts", "src/**/*.test.ts", "src/**/*.spec.ts", "src/test-setup.ts"]
 }