Fixes#79
Implement the date segment type in the part number generator. Uses Go's
time.Format with the segment's Value field as the layout string.
- Default format: 20060102 (YYYYMMDD) when no Value is specified
- Custom formats via Value field: "0601" (YYMM), "2006" (YYYY), etc.
- Always uses UTC time
- Add 3 tests: default format, custom YYMM format, year-only format
Fixes#66
Remove Inter and Roboto from font-family. The style guide specifies
system fonts only: -apple-system, BlinkMacSystemFont, Segoe UI,
system-ui, sans-serif.
Fixes#65
- Part: blue → green (--ctp-green)
- Assembly: green → mauve (--ctp-mauve)
- Document: yellow → blue (--ctp-blue)
- Add purchased (--ctp-peach) and phantom (--ctp-overlay1)
- Keep tooling as red (--ctp-red)