Add Arc cannon

[Masterliberty]

Arc Cannon with model, animations, tf1 weapon stats, and bug fixed _arc_cannon file.

[GeckoEidechse]

Current version is missing weapon precaching

See https://github.com/R2Northstar/NorthstarMods/pull/276/files#diff-a449854f2677ae627216b17300ddcde22f3e3788d101a84299689c207cd1cefcR7 for reference on how to add it ^^

[GalacticMoblin]

I would just like to mention I have a custom made Arc Cannon weapon icon I made for Archon.

[ASpoonPlaysGames]

I would just like to mention I have a custom made Arc Cannon weapon icon I made for Archon.

probably wont get used (yet) because uimg limit

[GeckoEidechse]

Some quick one-player testing. Still need to test with other players:

• Arc Cannon is added to the game as intended
• Sound effects appear to still be missing. Separate PR?
• This will break compat both ways between combinations of server/client old/new. There's not a really a fix for this. We will have to version gate it when we release it either way.

To test are still

• Check the damage effect when getting hit by Arc Cannon
• Have player without Arc Cannon join server with Arc Cannon (I expect them to be unable to connect as mentioned above)

[F1F7Y]

Sound effects appear to still be missing. Separate PR?

We can't add new sound effects so just like the triple threat itll have to stay silent

[F1F7Y]

From skimming over the code it looks good. Due to this being based on r1 the code quality wont be up to r2 standards, but just like the triple threat this is ok as the game wont be updated with a newer squirrel compiler.

[F1F7Y]

Tested together with #660 on Launcher #504

Works

[GeckoEidechse]

Works in testing. Of note is that this will break compatibility in the following way:

works: ✅
breaks: ❌

	Server old	Server Arc Cannon
Client old	✅	❌
Cleint Arc Cannon	✅	✅

[GeckoEidechse]

Alright Imma commit the original TF1 files first, then resolve merge conflicts myself and update the PR, then merge