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>

housekeeping/README.md

@@ -12,14 +12,7 @@ Database backup and maintenance scripts for the Evidencija Režija application.
 
 ## Usage
 
-From the monorepo root:
-
-```bash
-npm run backup:standalone --workspace=housekeeping
-npm run backup:swarm --workspace=housekeeping
-```
-
-Or directly from the housekeeping directory:
+From the housekeeping directory:
 
 ```bash
 cd housekeeping