…SecHud Icons (shiptest-ss13#2628)

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This pull request does the following:
* Revives shiptest-ss13#2455 and
shiptest-ss13#2493
* Sorts every factional outfit into a base outfit. These base outfits
apply a faction.
* Puts factional outfits into their own files.
* Adds (partial) factional backgrounds for sechud icons.

![imagen](https://github.com/shiptest-ss13/Shiptest/assets/75212565/07f7b83b-14bb-4cbf-a250-4dd16208da02)

![imagen](https://github.com/shiptest-ss13/Shiptest/assets/75212565/b32620e5-d0fe-4b59-b013-d30211f2f2aa)
* Adds a new Frontiersmen ERT. The gimmick is that their equipment is
randomized, for the true "when the first is killed, the second takes the
rifle" experience. You could get a mounted machine gun. Or a flyswatter.

![imagen](https://github.com/shiptest-ss13/Shiptest/assets/75212565/f5f058f1-4bdf-4abd-8bef-ff6158bdfb41)
* Makes Agent Cards work with SecHuds, and get overlays when using the
Select Chameleon Outfit button.
* Fixes the chameleon mask and goggles default icon states.

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Easier to sift through. IFF (2234). Support for custom SecHud icons.
Actually looks pretty on the outfit manager. Sugarcube Frontiersmen
Rogue-like 2024. Identity Threat+.

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:cl: MeeMOfCourse, retlaw34
tweak: Repathed almost every faction outfit, and they now apply factions
upon being used.
tweak: SecHud icons have been redone. Sprites by retlaw34.
tweak: Descriptions of multiple clothing items.
add: SecHuds now identify factions. Somewhat.
add: More desperate groups of Frontiersmen have been spotted roaming the
frontier.
/:cl:

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---------

Signed-off-by: meem <[email protected]>

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## About The Pull Request
Continuation of #2628, which was merged without a testmerge. This fixes
some ERT outfits, adds a Syndicate Inspector ERT (which had the outfit
defined but not the ERT), and fixes the independent sechud background.
Also messes with the CMM Inspector's icon.

![imagen](https://github.com/shiptest-ss13/Shiptest/assets/75212565/a3ac82d6-e5c2-4028-9992-f2565604ac0b)


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## Why It's Good For The Game
blame zephyr

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## Changelog

:cl:
add: ACLF Syndicate Inspector ERT
fix: Independent background icons
fix: ERT Outfits not having access and proper names
/:cl:

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Continuation of shiptest-ss13#2628, which was merged without a testmerge. This fixes
some ERT outfits, adds a Syndicate Inspector ERT (which had the outfit
defined but not the ERT), and fixes the independent sechud background.
Also messes with the CMM Inspector's icon.

![imagen](https://github.com/shiptest-ss13/Shiptest/assets/75212565/a3ac82d6-e5c2-4028-9992-f2565604ac0b)

<!-- Describe The Pull Request. Please be sure every change is
documented or this can delay review and even discourage maintainers from
merging your PR! -->
blame zephyr

<!-- Please add a short description of why you think these changes would
benefit the game. If you can't justify it in words, it might not be
worth adding. -->

:cl:
add: ACLF Syndicate Inspector ERT
fix: Independent background icons
fix: ERT Outfits not having access and proper names
/:cl:

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your name to the right of the first :cl: if you want to overwrite your
GitHub username as author ingame. -->
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icon ingame) and delete the unneeded ones. Despite some of the tags,
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the changes rather than a summary of the PR's contents. -->