Add TM:PE Compatibility Logic and Notification Support for Missing Addon in CSM

[bonsaibauer]

I’ve opened a new pull request that includes the requested changes, since the previous one had to be discarded after the branch was deleted.

The new PR implements the updated detection logic:

• If TM:PE is enabled but the addon is not, a notification window appears, either when joining a server from the main menu or when attempting to start a server in-game, recommending installation of the addon.
• If both TM:PE and the addon are enabled, TM:PE is marked as supported.
• If the addon is missing, TM:PE is shown as unsupported.

This covers the logic discussed in the original ticket #334 @kaenganxt
Danke dir für den Tip, ist eleganter so, thx for the tip, its more elegant that way!

My build process worked on my side, but I’m using VS Code. Please verify that it builds normally in your environment as well. I hope everything fits.

My friend and I have spent many great hours in multiplayer, and this is a way to give something back. TM:PE is an important tool for the game and integrating it makes the experience even better. So thank you for your work, @kaenganxt and many others here in the repository!

[kaenganxt]

Looks good, thank you!

[bonsaibauer]

How does it actually work with CSM and updating things on the Steam Workshop?
At least that’s what it says in the changelog — it hasn’t shown an update in two years, haha.