fix: proper module resolution in all cases (Node CJS, Node ESM, bundler)

* Add extensions to all imports

* Set module resolution to `bundler` to avoid Node specific behavior

* Use `ts2mjs` to rename files to `mjs`

* Add extensions to `@bbob/types` imports

* Fix `package.json` for proper ESM extension and type separation

* More module resolution stuff change (`node16` for everything, `node` for Vue 2 plugin)

* Use `ts-jest-resolver` for `js` -> `ts` resolving in Jest

* Add changeset

* Add import extensions to frontend libs

tsconfig.json

@@ -15,8 +15,8 @@
     "forceConsistentCasingInFileNames": true,
     "emitDeclarationOnly": true,
     "esModuleInterop": true,
-    "module": "esnext",
-    "moduleResolution": "node",
+    "module": "node16",
+    "moduleResolution": "node16",
     "resolveJsonModule": true,
     "downlevelIteration": true,
     "jsx": "preserve",