feat: modernize build tooling and add CI/CD workflow

Switch to Bun for 2-5x faster frontend builds, implement cargo-chef for
reliable Rust dependency caching, and add Biome for fast code
formatting.

Build system improvements:
- Replace pnpm with Bun for frontend package management
- Add cargo-chef to Dockerfile for better Rust build layer caching
- Update all commands to use bun instead of pnpm

Developer experience:
- Add comprehensive Justfile commands (format, format-check, db)
- Implement automated PostgreSQL Docker setup with random port
allocation
- Add stricter checks (--deny warnings on clippy, --all-features flag)

Code quality:
- Add Biome formatter for 10-100x faster TypeScript/JavaScript
formatting
- Add GitHub Actions CI/CD workflow for automated checks
- Update .dockerignore with comprehensive exclusions
- Format all code with cargo fmt (Rust) and Biome (TypeScript)

All changes maintain backward compatibility and can be tested
incrementally.

web/eslint.config.js

@@ -1,24 +1,24 @@
-import js from '@eslint/js';
-import tseslint from 'typescript-eslint';
-import react from 'eslint-plugin-react';
-import reactHooks from 'eslint-plugin-react-hooks';
-import reactRefresh from 'eslint-plugin-react-refresh';
+import js from "@eslint/js";
+import tseslint from "typescript-eslint";
+import react from "eslint-plugin-react";
+import reactHooks from "eslint-plugin-react-hooks";
+import reactRefresh from "eslint-plugin-react-refresh";
 
 export default tseslint.config(
   // Ignore generated files and build outputs
   {
-    ignores: ['dist', 'node_modules', 'src/routeTree.gen.ts', '*.config.js'],
+    ignores: ["dist", "node_modules", "src/routeTree.gen.ts", "*.config.js"],
   },
   // Base configs
   js.configs.recommended,
   ...tseslint.configs.recommendedTypeChecked,
   // React plugin configuration
   {
-    files: ['**/*.{ts,tsx}'],
+    files: ["**/*.{ts,tsx}"],
     plugins: {
       react,
-      'react-hooks': reactHooks,
-      'react-refresh': reactRefresh,
+      "react-hooks": reactHooks,
+      "react-refresh": reactRefresh,
     },
     languageOptions: {
       parserOptions: {
@@ -31,33 +31,30 @@ export default tseslint.config(
     },
     settings: {
       react: {
-        version: '19.0',
+        version: "19.0",
       },
     },
     rules: {
       // React rules
       ...react.configs.recommended.rules,
-      ...react.configs['jsx-runtime'].rules,
+      ...react.configs["jsx-runtime"].rules,
       ...reactHooks.configs.recommended.rules,
 
       // React Refresh
-      'react-refresh/only-export-components': [
-        'warn',
-        { allowConstantExport: true },
-      ],
+      "react-refresh/only-export-components": ["warn", { allowConstantExport: true }],
 
       // TypeScript overrides
-      '@typescript-eslint/no-unused-vars': [
-        'error',
+      "@typescript-eslint/no-unused-vars": [
+        "error",
         {
-          argsIgnorePattern: '^_',
-          varsIgnorePattern: '^_',
+          argsIgnorePattern: "^_",
+          varsIgnorePattern: "^_",
         },
       ],
-      '@typescript-eslint/no-explicit-any': 'warn',
+      "@typescript-eslint/no-explicit-any": "warn",
 
       // Disable prop-types since we're using TypeScript
-      'react/prop-types': 'off',
+      "react/prop-types": "off",
     },
   }
 );