NotepadNext

## What's Changed
- Added split editor shortcuts.
- Added quick tab controls to the toolbar.
- Added bulk close options for tabs.
- Improved file renaming by pre-filling the rename dialog and correctly removing the old file.
- Added the ability to search and bookmark lines.
- Added a setting to enable or disable auto-completion.
- Improved auto-completion with language keyword suggestions.
- Added `Shift+Enter` as a shortcut for backward search.
- Added `Shift+Scroll` for horizontal scrolling.
- Multiple search results can now be copied at once.
- Improved Find/Replace dialog sizing and behavior on smaller screens.
- Fixed the caret position when opening the context menu inside a text selection.
- Fixed the Unfold All action.
- Fixed an issue where new file names could incorrectly restart instead of incrementing.
- Fixed a crash when a session file cannot be read during startup.
- Added UTF-16 Little Endian and Big Endian encoding support.
- Added initial Windows ARM64 support.
- Improved macOS support, including text navigation key bindings and build reliability.
- Improved Linux AppImage support and added Linux build documentation.
- Updated ADS to version 5.1