feat: add task dependency support

[Vasist10]

Description

This PR implements task dependency support.

Users can select dependent tasks using a dropdown while creating or editing a task.
A task cannot be completed unless all its dependencies are completed, and tasks that have pending dependents cannot be completed.

• Fixes: Add more Fields to the Add Task Panel #188

Checklist

• Ran npx prettier --write . (for formatting)
• Ran gofmt -w . (for Go backend)
• Ran npm test (for JS/TS testing)
• Added unit tests, if applicable
• Verified all tests pass
• Updated documentation, if needed

Additional Notes

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[Vasist10]

@its-me-abhishek i have implemented the task dependency logic in here....pls look into this once and suggest if any changes are needed
i will follow this up with:
1.test frontend and backend
2. handling circular dependency

[its-me-abhishek]

This looks somewhat fine, although I disagree with showing latest 50 tasks inside that panel.
What could be done is use the same fuzzy search panel for users to search across their tasks - as provided in tasks panel.
Maybe import it to another component if required.
And then finally show that when searching/adding a dep to that project.