Implement search functionality for profiles and videos

- Modified `js/index.js` to handle search queries, detecting npubs for direct navigation.
- Added `views/search.html` and `js/searchView.js` to implement search UI and logic.
- Implemented dual-search strategy:
  - Profile search using NIP-50 on Kind 0.
  - Video search using NIP-50 on Kind 30078 and local cache search (robustness).
- Registered new search view in `js/viewManager.js`.
- Verified with Playwright tests.

verification/verify_search.py

@@ -1,40 +0,0 @@
-from playwright.sync_api import sync_playwright, expect
-
-def test_search_functionality():
-    with sync_playwright() as p:
-        browser = p.chromium.launch(headless=True)
-        page = browser.new_page()
-
-        # Navigate to the home page
-        page.goto("http://localhost:3000/index.html")
-
-        # Verify search input exists
-        search_input = page.locator("#headerSearchInput")
-        expect(search_input).to_be_visible()
-
-        # Type a query
-        search_input.fill("test")
-        search_input.press("Enter")
-
-        # Wait for hash change and search results view
-        page.wait_for_timeout(2000) # Give it a moment to load view
-
-        # Verify the hash updated
-        assert "#view=search&q=test" in page.url
-
-        # Verify the search title updated
-        title_locator = page.locator("#searchTitle")
-        expect(title_locator).to_be_visible()
-        expect(title_locator).to_have_text('Search Results for "test"')
-
-        # Verify sections exist
-        expect(page.locator("#searchChannelList")).to_be_visible()
-        expect(page.locator("#searchVideoList")).to_be_visible()
-
-        # Take a screenshot
-        page.screenshot(path="verification/search_view.png", full_page=True)
-
-        browser.close()
-
-if __name__ == "__main__":
-    test_search_functionality()