Hyperscript: precedes/follows comparisons, tokenizer keywords

Parser: precedes/follows comparison operators in parse-cmp.
Tokenizer: precedes, follows, ignoring, case keywords.
Runtime: precedes?, follows? string comparison functions.

372/831 (45%)

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

shared/static/wasm/sx/module-manifest.json

@@ -994,6 +994,7 @@
       "hs-falsy?",
       "hs-matches?",
       "hs-contains?",
+      "precedes?",
       "hs-empty?",
       "hs-first",
       "hs-last",