Bug: TypeScript build failing due to missing shadcn/ui dependencies

[ArshVermaGit]

Description

The local build and CI pipelines are currently broken because the TypeScript compiler (npm run type-check) is failing. The codebase is missing critical dependencies required by shadcn/ui components (specifically the badge and button components) and the idb-keyval module used in testing.

When running npm run type-check, the following errors are thrown:
```
src/components/ui/badge.tsx(2,40): error TS2307: Cannot find module 'class-variance-authority' or its corresponding type declarations.
src/components/ui/button.tsx(2,40): error TS2307: Cannot find module 'class-variance-authority' or its corresponding type declarations.
src/lib/utils.ts(2,25): error TS2307: Cannot find module 'tailwind-merge' or its corresponding type declarations.
test/ContributionGraph.test.ts(5,26): error TS2307: Cannot find module 'idb-keyval' or its corresponding type declarations.
```
Additionally, class-variance-authority missing causes cascading property type errors like Property 'variant' does not exist on type 'BadgeProps'.

Expected Behavior

• The npm run type-check command should exit with code 0.
• All dependencies used in UI components (like class-variance-authority, tailwind-merge, clsx, and lucide-react) should be correctly installed and present in package.json.

Steps to Reproduce

1. Clone the repository and run npm install.
2. Run npm run type-check.
3. Observe the TS2307 and TS2339 errors causing the build to fail.

Suggested Fix

1. Install the missing dependencies for the UI components and tests:
   ```bash
   npm install class-variance-authority tailwind-merge clsx idb-keyval
   ```
2. Verify if @types are needed for any of the above packages.
3. Run npm run type-check again to confirm the build passes.