fix(partners): make "Become a partner" button redirect to partner form (#97)

[kaif969]

Summary

Restore the "Become a partner" call-to-action in the Community Partners section so it navigates to a partner application entry point. This PR wires the CTA to a new application route and adds a minimal accessible partner application page. Closes #97.

Changes

• Updated Community Partners CTA to use router navigation and keyboard handlers (accessible aria-label).
• Added a minimal partner application page form skeleton: org name, contact email, message.
• Commit message used: fix(partners): make "Become a partner" button redirect to partner form ( [Bug report]: 'Become a partner' button not working or redirecting #97)

Testing

How I tested the changes locally:

• Created branch: fix/97-become-partner-button-redirect
• Started the dev server and navigated to the Community Partners section.
  • Clicking the "Become a partner" button navigates to an external site and shows the partner application page.
  • The CTA is keyboard-activatable (Enter) and has an appropriate aria-label.
• Navigating to each supported language route:
  • http://localhost:3000/en
  • http://localhost:3000/bn
  • http://localhost:3000/hi

Related Issue

Closes #97
#97

Notes

• The partner application page is intentionally minimal — it provides a safe place to implement an external form in a follow-up PR.
• If the project uses Next.js or a different routing solution, the navigation implementation should be adapted to the router.In that case, tests will need a small update.
• Reviewers: please confirm preferred UX.
• Branch name: fix/97-become-partner-button-redirect
• This PR includes a placeholder submit handler (alert). Replace with real submission logic in a follow-up PR.

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[priyankarpal]

looks good 🎉