Custom Header Tailor 1.0.1

This release renames the extension and improves the icons.

Changed
- Renamed the extension to Custom Header Tailor.
- Added rasterized PNG icons (16/32/48/96/128) alongside the SVG source, for consistent rendering in the toolbar, the add-ons manager and the AMO listing.

Unchanged since 1.0.0
- Override or add HTTP headers on requests and responses (declarativeNetRequest).
- Separate Request/Response sections, per-row enable toggle and optional URL match pattern.
- Rules saved locally, persist across restarts. UI in 12 languages.
- No data collection. MPL-2.0. Requires Firefox 142+.