Invalid hexcodes in several themes emacs, monokai_aqua, papercolor-light (Should be checked in CI at theme PRs?)

[LeoniePhiline]

Reproduction:

1. Open two terminals side by side
2. In one terminal, watch the hx log: tail -f ~/.cache/helix/helix.log
3. In the other terminal, open hx
4. Type :theme
5. Use the Tab key to go through all themes and observe the log.

Theme emacs

helix_view::theme [WARN] Theme: malformed hexcode: highlight

Theme monokai_aqua

helix_view::theme [WARN] Theme: malformed hexcode: light-black
helix_view::theme [WARN] Theme: malformed hexcode: light-black
helix_view::theme [WARN] Theme: malformed hexcode: purple

Theme papercolor-light

helix_view::theme [WARN] Theme: malformed hexcode: indent

Note: Logging the affected theme's name could be helpful! (Edit: But looking at the code, it seems unwieldy to carry the theme name around as much as would be necessary to log it in case of parsing errors.)

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I assume this should be checked in CI via xtask.

[sarsapar1lla]

Does this issue still require attention? If so, happy to take a look at it