feat: make search bar sticky and adjust scrollable area

[Anmol-Baranwal]

Fixes Issue

Closes #1418

Changes proposed

Why search bar should be sticky.

• Users can keep their search query visible while exploring different categories. This helps them remember their search context and makes it easy to refine or modify their search without losing sight of the results.
• With a sticky search bar, users can focus on interacting with the search input without distractions, as it remains in a fixed position regardless of their scrolling behavior.

Screenshots

Sticky search bar

Note to reviewers

• I initially attempted different styling approaches but later changed my approach after trying various options, as this one appeared to be the most sophisticated and easy to understand.

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
linkshub	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 1, 2023 10:51am

[github-actions]

Thank you, Anmol-Baranwal, for creating this pull request and contributing to LinksHub! 💗

The maintainers will review this Pull Request and provide feedback as soon as possible! 😇
We appreciate your patience and contribution, Keep up the great work! 😀

[CBID2]

Looks ok

[rupali-codes]

@Anmol-Baranwal can we reduce the space between this two?

[Anmol-Baranwal]

@Anmol-Baranwal can we reduce the space between this two?

Done.

[CBID2]

LGTM

[rupali-codes]

lgtm