feat: Add new scripts and update project structure for database management and user authentication

This commit introduces several new scripts for managing database operations, including user creation, permission grants, and data migrations. It also adds new documentation files to guide users through the setup and configuration processes. Additionally, the project structure is updated to enhance organization and maintainability, ensuring a smoother development experience for contributors. These changes support the ongoing transition to a web-based architecture and improve overall project functionality.

viewer-frontend/.gitignore

@@ -0,0 +1,48 @@
+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.*
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/versions
+
+# testing
+/coverage
+
+# next.js
+/.next/
+/out/
+
+# production
+/build
+
+# misc
+.DS_Store
+*.pem
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.pnpm-debug.log*
+
+# env files (can opt-in for committing if needed)
+.env*
+!.env.example
+
+# vercel
+.vercel
+
+# typescript
+*.tsbuildinfo
+next-env.d.ts
+
+/app/generated/prisma
+
+# history files (from Local History extension)
+.history/
+*.history