Feature: Added an action to close all tabs

[yaira2]

Resolved / Related Issues

To prevent extra work, all changes to the Files codebase must link to an approved issue marked as Ready to build. Please insert the issue number following the hashtag with the issue number that this Pull Request resolves.

• Closes Feature: Add the ability to close all tabs with Ctrl+Shift+W #16414
• Changed default shortcut for 'Close active pane' to ctrl+alt+w to prevent a conflict with the 'Close all tabs' action.

Steps used to test these changes

Stability is a top priority for Files and all changes are required to go through testing before being merged into the repo. Please include a list of steps that you used to test this PR.

1. Confirmed the action closes all tabs

[0x5bfa]

For our reminder:
https://github.com/files-community/Website/blob/bf8467854d3c26cc592deceef6b0cc179aa0c45c/src/routes/docs/customize-settings/actions/%2Bpage.md?plain=1#L1451

[yaira2]

For your reminder: https://github.com/files-community/Website/blob/bf8467854d3c26cc592deceef6b0cc179aa0c45c/src/routes/docs/customize-settings/actions/%2Bpage.md?plain=1#L1451

Already ahead of you files-community/Website@9e63bf6 🙂

[0x5bfa]

lol. Nice!!