Fix naming inconsistencies in Git UI components and add Node.js version to package.json

[zeroprooff]

PR addresses several naming inconsistencies in the Git UI components and adds the required Node.js version to package.json:

1. Fixed typos in component names:

   • Renamed SourceControGroup to SourceControlGroup in sourcecontrolgroup.tsx
   • Updated corresponding interface name from SourceControGroupProps to SourceControlGroupProps

2. Fixed typos in file names:

   • Renamed sourcontrol.tsx to sourcecontrol.tsx
   • Renamed sourcontrolitembuttons.tsx to sourcecontrolitembuttons.tsx

3. Updated imports to match the corrected file names:

   • In gitui.tsx: Updated import path for SourceControl component
   • In sourcecontrolitem.tsx: Updated import path for SourceControlItemButtons component

4. Added Node.js version to package.json to align with the version specified in README.md:

   • Added "node": "^20.0.0" to the engines section

These changes improve code consistency and maintainability without changing any functionality.

[netlify]

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