refactor: simplify to independent multi-project structure

Removed npm workspace configuration in favor of simple multi-project repository.
Each project (web-app, housekeeping) is now completely self-contained.

## Changes
- Removed root package.json and package-lock.json
- Added VS Code workspace file for better project organization
- Updated documentation to reflect independent project structure
- Each project manages its own dependencies without workspace linking

## Structure
- web-app/: Self-contained Next.js application
- housekeeping/: Self-contained DB maintenance scripts
- No workspace management or dependency sharing
- Monorepo is purely for Git organization

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

evidencija-rezija.code-workspace

@@ -0,0 +1,39 @@
+{
+  "folders": [
+    {
+      "name": "🌐 web-app",
+      "path": "web-app"
+    },
+    {
+      "name": "🔧 housekeeping",
+      "path": "housekeeping"
+    },
+    {
+      "name": "📦 root",
+      "path": "."
+    }
+  ],
+  "settings": {
+    "files.exclude": {
+      "**/node_modules": true,
+      "**/.next": true,
+      "**/.git": false
+    },
+    "search.exclude": {
+      "**/node_modules": true,
+      "**/.next": true,
+      "**/package-lock.json": true
+    },
+    "typescript.tsdk": "web-app/node_modules/typescript/lib",
+    "eslint.workingDirectories": [
+      "web-app"
+    ]
+  },
+  "extensions": {
+    "recommendations": [
+      "dbaeumer.vscode-eslint",
+      "esbenp.prettier-vscode",
+      "bradlc.vscode-tailwindcss"
+    ]
+  }
+}