Roundstart Grappling Gun

[EmoGarbage404]

About the PR

Makes the grappling gun a roundstart item for salv and adds it into the equipment pool.
also fixes a bug that would cause the overlay to go invisible
also also resprites it.

Why / Balance

few ideas:

1. It's very fun and fun is good :)
2. Helps deal with a common problem: getting stuck in space nearby a wreck
3. Makes low-level space navigation significantly easier

By the time salv usually gets this from sci, they've already gone past regular jumping and moved on to jetpacks or shittles. This really isn't super strong and doesn't have a niche outside of roundstart. Ergo, here it is.

Media

Requirements

• I have read and I am following the Pull Request Guidelines. I understand that not doing so may get my pr closed at maintainer’s discretion
• I have added screenshots/videos to this PR showcasing its changes ingame, or this PR does not require an ingame showcase

Breaking changes

Changelog

🆑

• add: The grappling gun is now available inside the salvage vendor. Additional ones can be scavenged in space.
• remove: Removed the grappling gun from science research and lathes.
• fix: Fixed issue that made the rope from the grappling gun not appear.

[github-actions]

RSI Diff Bot; head commit c696367 merging into 7b82317
This PR makes changes to 1 or more RSIs. Here is a summary of all changes:

Resources/Textures/Objects/Weapons/Guns/Launchers/grappling_gun.rsi

State	Old	New	Status
base-unshaded-off			Modified
base-unshaded			Modified
base			Modified
hook			Modified
inhand-left			Modified
inhand-right			Modified