fix: reset isDirty state when edits revert to original

[Nithishvb]

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Description

Related Issues

Closes: #2183

Type of Change

• [x] Bug fix
• [ ] New feature
• [ ] Documentation update
• [ ] Release
• [ ] Refactor
• [ ] Other (please describe):

Testing

Screenshots (if applicable)

Additional Notes

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[!IMPORTANT] Fixes isDirty state in IDEManager by using savedContent to track original file content.

• Behavior:
  • Fixes isDirty state in IDEManager by introducing savedContent in EditorFile to track original content.
  • Updates updateFileContent() to compare content with savedContent instead of content.
  • Modifies saveActiveFile() to update savedContent after saving, ensuring isDirty is reset.
• Data Structures:
  • Adds savedContent to EditorFile interface to store original file content.

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