feat(content): Add stiletto category

[KheirFerrum]

Purpose of change

Discord reminded me that soldering irons weren't supposed to have the KNIVES weapon category.

• Updates Weapon Category Update #1709

Describe the solution

Adds STILETTOS weapon category and grants them to Ninjutsu and Eskrima.

Describe alternatives you've considered

• Could grant them to some other style than eskrima since it covers a goodly number of weapons already, options include Krav Maga and maybe fencing.

Testing

• I built it, loaded a game and it didn't crash.
• Check that screwdrivers and soldering irons appear with STILETTOS category
• Check that eskrima and ninjutsu have it as their weapon options.

Additional context

Checklist

[autofix-ci]

Autofix has formatted code style violation in this PR.

I edit commits locally (e.g: git, github desktop) and want to keep autofix

1. Run git pull. this will merge the automated commit into your local copy of the PR branch.
2. Continue working.

I do not want the automated commit

1. Format your code locally, then commit it.
2. Run git push --force to force push your branch. This will overwrite the automated commit on remote with your local one.
3. Continue working.

If you don't do this, your following commits will be based on the old commit, and cause MERGE CONFLICT.

[scarf005]