[Feature] integrate @wgetJane's ttt-weapon-rework features

[EntranceJew]

This is more or less a reminder for myself.

We've got the go-ahead to bring down the functionality from @wgetJane's weapon rework, and it makes a lot of worthwhile changes that should be integrated into the base equipment as an option under the F1 > Edit Equipment menu.

The major ones are:

• all the loose equipment changes
• gun kickback interpolation
• HUD helper for drawing meters should probably go in a library / extension
• third-person ADS / scope visualization, similar to these sprint animations

This was also alluded to by #1100. Could also fix #964. Would include changes for #1059. A yet-unscoped weapon editor feature is probably a subset of the changes that will be involved in this task so potentially spitball or link those here.

Additional Notes

• weapon_ttt_beacon is broken, entity ttt_beacon is missing upstream, so we have to bring it down.
• We also have the go-ahead to include anything from Misc TTT tweaks and fixes but not all of those pertain to equipment. Might be more relevant when I start to move loose SMORE features out and into the code.

[TimGoll]

• We also have the go-ahead to include anything from Misc TTT tweaks and fixes but not all of those pertain to equipment. Might be more relevant when I start to move loose SMORE features out and into the code.

I took those addons and put them into seperate issues

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.