Syntax highlighting for .imlx files - IMLX: Invariant Markup Language
(eXtended), the gated plain-text format where conformance is decided by a
deterministic gate with a single-bit verdict.
Highlights headers, headings, envelopes, bullets, math fences, page breaks,
pipe tables, the 21 opcodes, trace events and outcomes, registers,
@references, SLOT contracts, and SHA-256 digests.
