[MIRROR] workspace improvements

[VirgoBot]

Original PR: PolarisSS13/Polaris#8583

closes #8554 -- conflicting outcomes

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This improves repository health by:

• Adding a dependabot config to keep action versions and npm targets updated.
• Updating workflows to ubuntu-latest, instead of bionic.
• Correcting python files to not have mixed indentation and be 3.Xy.
• Adding a node script that can be used to identify files with bad UTF-8 contents.
  • This was necessary because python is a sad, weak thing. Destroy snek.

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This improves the VSC, DMLS, and alternate editor experience by:

• Grouping dme, dmf, dmm, dm together as the [dm] language alias.
• Uniformly applying \r\n and tab indent rules to [dm].
• Preferring \n line endings for all other file types.
• Explicitly using utf-8 encoding for all files.
• Enabling whitespace trimming for all files.
  • Except markdown, which does not trim final newlines for formatting reasons.
• Enforcing the local 4 space python indent.
• Enforcing the local 2 space yaml indent.
  • And cleaning up the inconsistently indented autochangelog workflow.
• Recommending language support, the language server, editorextensions, and gitlens.
• Adding a .editorextensions file with indent, trimming, etc as close as possible to VSC settings.
  • This permits the use of things like sublime and atom, if they are set up for it.
• Letting you preview DMI files in VSC (1).
• Building the type tree for (best effort) alternate source navigation (2).
• Skipping the task failed abort modal for suite builds that fail.
• Defaulting suite tick on create and auto update on.

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(1):

(2):

Building the type tree also lets you discover path bugs with your eyes!

[Very-Soft]

me want to look into this more later

[Cameron653]

This has been sitting and has a lot of conflicts. Highly suggest to port this over later.

I won't close this because of it's importance, but this should be fixed ASAP.

[Heroman3003]

I don't really get this but it seems to be mostly for VSC nerds and if you say this is important, I'll leave this hanging.

[Heroman3003]

This is usalvagable by now, I imagine?

[Heroman3003]

I'll just say that if this is wanted, people are free to request a reopen on this, but until then, to the bin it goes.