refactor: migrate from better-sqlite3 to bun:sqlite

- Updated build-hooks.js to remove better-sqlite3 dependency and use bun:sqlite.
- Modified smart-install.js to eliminate checks and installations related to better-sqlite3.
- Refactored Database.ts, SessionSearch.ts, SessionStore.ts, and migrations.ts to import and utilize bun:sqlite.
- Replaced exec and pragma calls with appropriate run methods for bun:sqlite compatibility.
- Removed unnecessary native module verification and installation logic for better-sqlite3.

plugin/package.json

@@ -1,13 +1,12 @@
 {
   "name": "claude-mem-plugin",
-  "version": "7.0.9",
+  "version": "7.0.10",
   "private": true,
   "description": "Runtime dependencies for claude-mem bundled hooks",
   "type": "module",
-  "dependencies": {
-    "better-sqlite3": "^12.5.0"
-  },
+  "dependencies": {},
   "engines": {
-    "node": ">=18.0.0"
+    "node": ">=18.0.0",
+    "bun": ">=1.0.0"
   }
 }