[smoltafet]

Implements #638.

Bare four-digit numbers are intentionally not parsed as times (years - see the guard added for "2019 to 2020"), so this adds a dedicated ENMilitaryTimeParser for the shapes that unambiguously mark a four-digit group as a time of day:

• 1430 hours, 0930hrs, 0800 hr ("hours" suffix)
• at 1430, meet at 0930 ("at" prefix)
• 1430Z, 1430 Z (Zulu designator - also assigns timezoneOffset 0)

The HHMM value is validated (hour 00-23, minute 00-59), so invalid times like at 2460 or at 2500 hours are rejected, and bare numbers (1430, 2019 to 2020) still do not parse. The parser is a small standalone parser per the repo's modular-parser guidance, registered in the EN configuration right after ENTimeExpressionParser, and merges with dates as usual ("On Oct 22 at 1430 hours", "at 0745 tomorrow").

Tests: new test/en/en_military_time.test.ts (individually spelled-out cases per AGENTS.md: suffix/prefix/Zulu forms, date merging, bare-number negatives, invalid-time negatives). Full suite: 159 suites / 759 tests pass; npm run prettier applied.

[smoltafet]

Hi @wanasit, could you take a look at this when you have a chance? Happy to make changes if anything needs work. Thanks!