giles 08cd82ed65 Parser: catch/finally in on handlers, cmd terminators — 279/831 (34%) ...

- parse-cmd: catch/finally/end/else/otherwise are now terminators that
  stop parse-cmd-list (return nil from parse-cmd)
- parse-on-feat: optional catch var handler / finally handler clauses
  after the command body, before 'end'
- emit-on: scan-on passes catch-info/finally-info through recursion,
  wraps compiled body in (guard (var (true catch-body)) body) when
  catch clause is present
- Runtime: hs-put! handles "start" (afterbegin) and "end" (beforeend)
- Removed duplicate conformance-dev.sx (all 110 tests already in behavioral)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

2026-04-10 21:51:43 +00:00

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