Port bun-mariadb conventions: init globals, db handler, split schema sync

- init() loads config, schema and the SQLite client once into globals
- all CRUD queries go through lib/db-handler.ts (optional per-call config)
- split db-schema-manager.ts into lib/schema/* with FK-aware table ordering
- add bun:test tests for schema ordering, FK constraints and schema sync
- config/schema files can be .ts/.js/.json/.yaml/.yml; db_schema_file_name
  is now optional (defaults to schema.* in db_dir)
- add export/import commands (database snapshot + schema archives)
- package exports map, type re-exports, hardened publish.sh
- validate table name in delete

Co-Authored-By: Claude Opus 5.5 <[email protected]>

package.json

@@ -1,15 +1,35 @@
 {
     "name": "@moduletrace/bun-sqlite",
     "version": "1.1.13",
-    "description": "SQLite manager for Bun",
+    "description": "Schema-driven SQLite manager for Bun",
     "author": "Benjamin Toby",
-    "main": "dist/index.js",
+    "type": "module",
+    "main": "./dist/index.js",
+    "types": "./dist/index.d.ts",
+    "exports": {
+        ".": {
+            "types": "./dist/index.d.ts",
+            "import": "./dist/index.js",
+            "default": "./dist/index.js"
+        },
+        "./types": {
+            "types": "./dist/types/index.d.ts",
+            "import": "./dist/types/index.js",
+            "default": "./dist/types/index.js"
+        }
+    },
     "bin": {
-        "bun-sqlite": "dist/commands/index.js"
+        "bun-sqlite": "./dist/commands/index.js"
+    },
+    "engines": {
+        "bun": ">=1.3.0"
     },
     "scripts": {
         "dev": "tsc --watch",
-        "compile": "rm -rf dist && tsc"
+        "compile": "rm -rf dist tsconfig.tsbuildinfo && tsc -p tsconfig.json",
+        "typecheck": "tsc -p tsconfig.json --noEmit",
+        "test": "bun test src",
+        "prepublishOnly": "bun run compile"
     },
     "devDependencies": {
         "@types/bun": "latest",
@@ -29,6 +49,14 @@
         "type": "git",
         "url": "git+https://git.tben.me/Moduletrace/bun-sqlite.git"
     },
+    "keywords": [
+        "bun",
+        "sqlite",
+        "schema",
+        "orm",
+        "sql",
+        "vector"
+    ],
     "dependencies": {
         "@inquirer/prompts": "^8.3.0",
         "chalk": "^5.6.2",