Make RenderCoordinator errors recoverable

[jandrokt]

Description

This pull request ensures that any errors that may surge in RenderCoordinator#init are propagated back to the UI and so that an error message is shown instead of crashing the entire client.

Fixes #175 (not sure if fully)

Type of change

Please delete options that are not relevant.

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update

Checklist:

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation comments
• [x] My changes generate no new warnings

[mattg42]

Any reason why RendererError is a struct with a separate error kind enum property, instead of just being an enum itself?

[stackotter]

Any reason why RendererError is a struct with a separate error kind enum property, instead of just being an enum itself?

Hahah didn't see this until after I submitted my review, you beat me to it

[stackotter]

I'll wait for the workflows to complete.