Use a GET request and search query param for search results

[jasongitmail]

Expected behavior

1. Visit https://market.nativescript.org/ and search for something like bottomsheet
2. URL should become https://market.nativescript.org/?q=bottomsheet or similar, and show search results.
3. Click a plugin.
4. Click browser's back button. URL should become https://market.nativescript.org/?q=bottomsheet again and show search results again.

Current behavior

On Step 4, clicking the back button returns to https://market.nativescript.org, bottomsheet remains in the user's text input, but the page shows the same plugin list as the homepage and not filtered search results.