Add inhand sprites for the pride pins

[momochitters]

About the PR

Adds in-hand sprites for the pride pins.

Why / Balance

As said in the MegaIssue™ below, "There's many items in the game currently lacking any form of Inhand sprites and just appear invisible when held. While not exactly a high priority, fixing and adding inhands to many of these will help with general immersion and visibility."
#33386

Technical details

• Edits pins.yml and the texture's meta.json file.
• Adds left and right inhand textures for each pride pin.

Media

Requirements

• I have read and am following the Pull Request and Changelog Guidelines.
• I have added media to this PR or it does not require an ingame showcase.

Changelog

None, due to this PR not affecting gameplay.

[github-actions]

RSI Diff Bot; head commit c42d170 merging into fa020ce
This PR makes changes to 1 or more RSIs. Here is a summary of all changes:

Resources/Textures/Clothing/Neck/Misc/pins.rsi

State	Old	New	Status
ally-inhand-left			Added
ally-inhand-right			Added
aro-inhand-left			Added
aro-inhand-right			Added
asex-inhand-left			Added
asex-inhand-right			Added
autism-inhand-left			Added
autism-inhand-right			Added
bi-inhand-left			Added
bi-inhand-right			Added
gay-inhand-left			Added
gay-inhand-right			Added
gender-inhand-left			Added
gender-inhand-right			Added
goldautism-inhand-left			Added
goldautism-inhand-right			Added
inter-inhand-left			Added
inter-inhand-right			Added
les-inhand-left			Added
les-inhand-right			Added
lgbt-inhand-left			Added
lgbt-inhand-right			Added
non-inhand-left			Added
non-inhand-right			Added
omni-inhand-left			Added
omni-inhand-right			Added
pan-inhand-left			Added
pan-inhand-right			Added
trans-inhand-left			Added
trans-inhand-right			Added

Edit: diff updated after c42d170

[TiniestShark]

Look just about the right size I'd say, nice work! Updated the megaissue thread with this.

[github-actions]

This pull request has conflicts, please resolve those before we can evaluate the pull request.