Spawn Location Configuration [SYNTH-235]

[AlexD717]

Task

SYNTH-235

Symptom

Currently we support having custom robot spawn locations (used when starting a match), but no user facing way to edit it (apart from developer tools, which isn't user friendly).

Solution

Add a configuration options for fields for editing robot spawn locations.

Verification

• Can edit robot spawn locations for fields (test by starting match mode with "Move Robots to Starting Position" toggled on)
• Camera position editing still works
• Shows a cone indicator for robot positions and fixed rotation camera positions corresponding to their direction.

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• All acceptance criteria outlined in the ticket are met.
• Necessary test cases have been added and updated.
• A feature toggle or safe disable path has been added (if applicable).
• User-facing polish:
  • Ask: "Is this ready-looking?"
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  • PR links to the relevant Jira issue.
  • Jira ticket has a comment referencing this PR.

[rutmanz]

I might add a background of some kind and maybe alliance color (attached what I did for protected zones for reference) just to make each spawn position card feel separate. Right now the style feels a little unpolished.

This is definitely an improvement over the old system, I was observing that there is no way to visualize the yaw though. Maybe an arrow like we have for the ejector but a different color? Or maybe like a ghost dozer to give a sense of direction and scale

It also might be nice to have the xyz coordinates editable, just to help people align them if they want. Could also leave that to the devtools interface though, I don't feel strongly about this one

[rutmanz]

LGTM, I think some of the refactors could be made more general but up to you. I didn't realize that react hooks could be made reusable like that but it makes a lot of sense and feels much cleaner