Bump RDoc to 7.0.3

Fix search dropdown behaviour (#1512)

After this change:

| Scenario | Behavior |
|----------|----------|
| Type search, click result | Navigate without `?q=`, clean URL without
dropdown |
| Type search, press Enter | Navigate without `?q=`, clean URL without
dropdown |
| Land on URL with `?q=` param | Show dropdown with pre-filled query |
| Click outside dropdown | Hide dropdown, keep input value |
| Focus input with existing query | Show dropdown again |

Bump RDoc version to 7.0.1 (#1510)

We got 2 new bug fixes!
v7.0.0...master

Rebuild Aliki's searching mechanism (#1504)

Rebuild Aliki's search mechanism with a custom search index and improved
ranking algorithm.

Key changes:
- Aliki now generates its own search index (`js/search_data.js`) instead
of using the shared JsonIndex generator (can be removed along with
Darkfish in the future)
- New search ranking algorithm with better prioritization:
- Lowercase queries prioritize methods; uppercase queries prioritize
classes/modules/constants
  - Exact matches rank higher; shorter names preferred
- Class methods rank above instance methods (I don't have strong opinion
on this one)
- Search results now display type badges (class, module, const, method)
- Constants are now included in search results

Closes #1497 

<img width="50%" alt="Screenshot 2025-12-16 at 17 57 50"
src="https://github.com/user-attachments/assets/689cd862-3669-43f7-93e1-218923f3cd0e"
/>

Bump version to 6.17.0

Add version query string to Aliki assets for cache busting (#1476)

Bump version to 6.16.0 (#1474)

v6.15.1...master

This will include the new Aliki theme and the ability to specify
generator (theme) in `.rdoc_options`.

Bump version to 6.15.1 (#1441)

v6.15.0...master

Bump version to 6.15.0 (#1429)

v6.14.2...master

Bump version to 6.14.2 (#1387)

v6.14.1...master but mostly for
#1386 which can immediately improve `ruby/ruby`'s documentation.