Header search bar

[mrudulpatil18]

fixes #75

Changes:

• added SearchComponent
• connected to /snippets/search endpoint
• directs to editor view in new tab
• closes results when clicked outside the component

Demo:

https://github.com/user-attachments/assets/26a3833c-7e92-4735-a2b7-1f8c3ebac5ef

cc: @seveibar

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