feat: add French, a Preferences page saved under Colony/Collector, and the Colony themes and accents with high contrast

[MotherSphere]

Collector now speaks English or French, has a Preferences page, and draws in the Colony themes and accents.

Language

• Every string goes through t/tf, with French units and decimal commas.
• The language follows the system, or the Preferences choice, which also applies to --help and error messages.
• collector --version still prints exactly collector X.Y.Z.

Preferences

• Clicking Collector in the top-left corner, or pressing p, opens the page in place of the boxes. Close, Esc or p close it.
• Categories follow colony-ui's order: General, Appearance, Accessibility, then About. Sections are collapsible and arrive closed.
• Keyboard and mouse send the same messages. The wheel moves through the open category.
• The file is <config>/Colony/Collector/preferences/preferences.json, saved at once, written atomically. Fields use colony-ui StandardPreferences names, plus language and refresh_interval.
• Reading is lenient per field. A file that is not JSON is renamed to preferences.json.invalid and never overwritten.
• src/paths.rs ports the colony-ui path table, including the reserved apps refusal.

Themes

• config/themes.json is a byte copy of Resources generated/themes.json, refreshed to Resources main c19a39d, which carries the shared Preferences labels and the contrastEnds ink and paper. A new CI job (themes.json) fails with the refresh command when the copy falls behind Resources main.
• src/theme.rs ports from colony-ui:
  • the resolver with its Gruvbox dark fallback,
  • with_high_contrast, with the same amounts,
  • contrast_on, which takes its ink and paper from the contrastEnds of themes.json rather than hard-coding them. A test holds those ends to colony-ui's INK and PAPER.
• Colours are 24-bit when the terminal advertises it (COLORTERM, or WT_SESSION), otherwise the nearest of the xterm 256.
• Every widget draws from the palette. A test fails if a colour literal appears outside theme.rs.
• Appearance:
  • theme cards per family, using themes.json labels,
  • the eight accent swatches, plus auto accent,
  • a live preview.
• Accessibility: high contrast and reduce motion. A note explains that the terminal owns the font and text size.
• A theme change shows colony-ui's theme_applied toast in the footer.

colony-ui itself is not a dependency: it pulls in iced, which would break the Linux crate and binary-size budgets. Its contract is mirrored by hand instead: field names, shared en/fr strings, category order and theme maths. A test holds every copied settings_* and theme_applied string, in both locales, to the labels in themes.json, so a reworded shared label fails CI here.

README: the Privacy table, Preferences, key tables, themes and the truecolor note are updated. Merged with #12: its Status and roadmap are kept, with the 0.3.0 features marked as tested in CI only. The binary size line now says about 1.3 MB.

Verification

• Checked against the colony-ui 0.1.6 sources:
  • StandardPreferences field names, per-field lenient reading, and selected_accent left out when unset.
  • All 30 shared strings, identical in en and fr.
  • The category order.
  • The high-contrast amounts, and the INK and PAPER colours of contrast_on, now read from contrastEnds.
• cargo test: 45 unit tests passed, including render tests at 80 columns in en and fr, the labels test and the contrastEnds test, plus 7 CLI tests and 3 pseudo-terminal tests.
• cargo fmt --check is clean.
• CI is green on the final commit: tests on all three OS (pty test included), MSRV, clippy, advisories, CodeQL, colony.json and themes.json.
• Linux budgets: 81 of 82 crates, and a 1,322,320-byte binary (limit 3 MB).