feat(theme): add cyberdream and cyberdream_light themes (@ahashim)

[ahashim]

Description

Adds cyberdream and its light variant cyberdream_light, ported from the cyberdream.nvim colorscheme. cyberdream is a high-contrast dark theme built around a bright cyan accent on a near-black background; cyberdream_light is the same idea inverted onto white using the plugin's official light palette. Neither overlaps with the existing themes (the closest is cyberspace, which is green-on-dark and reads very differently).

How I mapped the palette onto Monkeytype's colors (dark / light):

• bg #16181a / #ffffff and subAlt #1e2124 / #eaeaea — the background and its slightly offset surface color.
• main / caret #5ef1ff / #008c99 — the signature cyan in each variant.
• sub #7b8496 (shared) — the palette's grey, used for the untyped text.
• text #ffffff / #16181a — white on the dark theme, near-black on the light one, per the theme guidelines.
• error #ff6e5e / #d11500, with a dimmer errorExtra (#b24d42 / #920f00) so extra letters read as secondary.
• For colorful mode I used the palette's pink and magenta (#ff5ea0 / #ff5ef1 on dark, #f40064 / #d100bf on light) so errors stay vibrant and clearly distinct from the plain red.

Each theme also has a small CSS file that gives the nav items their own accents pulled from the palette, since those distinct saturated colors are really the whole identity of cyberdream.

I checked both variants for readability with colorful mode and flip test colors on and off (screenshots below).

Screenshots

cyberdream (dark)

normal	colorful mode	flip test colors

cyberdream_light

normal	colorful mode	flip test colors

Checks

• Adding a theme?
  • Followed the themes documentation
  • Add theme to packages/schemas/src/themes.ts
  • Add theme to frontend/src/ts/constants/themes.ts
  • (optional) Add theme css file to frontend/static/themes
  • Add some screenshots of the theme, especially with different test settings (colorful, flip colors)
• Make sure the PR title follows the Conventional Commits standard.
• Make sure to include your GitHub username prefixed with @ inside parentheses at the end of the PR title.

[Copilot]

Pull request overview

Adds new built-in theme cyberdream (ported palette + optional theme CSS) to expand Monkeytype’s theme catalog with a high-contrast cyan-on-near-black option.

Changes:

• Register cyberdream in shared schema theme enum.
• Add cyberdream color tokens to frontend theme constants (incl. hasCss: true).
• Add frontend/static/themes/cyberdream.css for per-nav-item accent colors.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
packages/schemas/src/themes.ts	Adds cyberdream to the canonical ThemeName enum.
frontend/src/ts/constants/themes.ts	Defines cyberdream theme palette and marks it as CSS-backed.
frontend/static/themes/cyberdream.css	Implements cyberdream-specific nav accent styling.