refactor: convert to bun workspaces monorepo

- Move web app into apps/web/
- Create packages/shared/ with shared types
- Create plugins/decky-vault/ scaffold
- Root package.json manages workspaces only

apps/web/lib/db/schema/index.ts

@@ -0,0 +1,14 @@
+// Barrel export — domain + auth schemas
+export * from "./auth"
+export * from "./games"
+export * from "./gameVersions"
+export * from "./hardware"
+export * from "./performanceEntries"
+export * from "./gamePlatformSupport"
+export * from "./gameComments"
+export * from "./savedGames"
+export * from "./reports"
+export * from "./community-suggestions"
+export * from "./saved-filters"
+export * from "./storage"
+export * from "./entryScreenshots"