Option for automatic light/dark mode from system theme

[thatcomputerguy0101]

This adds an option for a "system" theme that will pull the light or dark mode setting from the browser in CSS. Currently this duplicates the dark mode styles, but could be modified in the future to use the light-dark function and remove style duplication once browser support is no longer a concern.

The new system theme will be the default for new installs, but existing installs will maintain their current theme setting.

[thatcomputerguy0101]

This would fulfill #67.

[thatcomputerguy0101]

Additionally, the new menu option will need to be added to most of the localization tables.

[ossilator]

i don't believe that that package-lock.json file belongs into the commit. please amend and force-push.

note also the pinned issues.

[thatcomputerguy0101]

I've fixed the package-lock.json file. You might want to add that to the .gitignore file if you don't want it tracked.

[thatcomputerguy0101]

By the pinned issues, I'm assuming you are referencing the lack of continued support with the Manifest v3 changes?

[ossilator]

correct.

[MatheusRich]

I understand the projects is essentially going to die. But can we get this merged before that? It seems that we can keep using this as-is at least until Jun 2025?

[Technetium1]

I agree, merging would be good even if it doesn't get put into a release, assuming it's been tested.

[gioxx]

The main reason we no longer released intermediate versions of TMS on the Chrome Store is that the extension is completely incompatible with Google Chrome's (no longer so new) tab grouping system. Releasing an update would mean breaking all tab grouping for all users who use TMS, because TMS is still unable to talk properly with that system (and it's not even certain that it really can be even by switching to Manifest V3), effectively making it a problem instead of an ally.