chore: prune unused apps and services for the moeka fork

- Remove stage-tamagotchi, stage-pocket, server, and engine workspaces with their workflows, addons, and docs
- Switch the toolchain from pnpm to bun, replace lockfiles with bun.lock
- Rewrite remaining product references to Moeka

vitest.config.ts

@@ -5,24 +5,15 @@ import { providerInferenceProjects } from './packages/provider-inference/vitest.
 export default defineConfig({
   test: {
     projects: [
-      'server/apps/auth',
-      'server/apps/api',
-      'apps/ui-server-auth',
-      'apps/stage-tamagotchi/vitest.node.config.ts',
-      'packages/cap-vite',
       'packages/ccc',
       'packages/core-agent',
       'packages/i18n',
       'packages/input-gamepad',
-      'packages/input-gamepad-vueuse',
       'packages/input-playstation-dualsense-5',
       'packages/model-driver-lipsync',
       'packages/better-ws',
       'packages/plugin-sdk',
-      'packages/plugin-sdk-tamagotchi',
       ...providerInferenceProjects.map(project => ({ ...project, root: 'packages/provider-inference' })),
-      'packages/scenarios-stage-tamagotchi-browser',
-      'packages/scenarios-stage-tamagotchi-electron',
       'packages/server-runtime',
       'packages/server-sdk',
       'packages/stage-shared',