feat(editor): add --catalog-find directory-wide id search

New utility complements --catalog-pluck (single-file id
lookup) by walking a directory tree recursively and
searching every catalog for entries whose primary key
matches the supplied id. Reports each hit as
[WXXX] file:fieldName=id "name" so the operator can
locate where any given id lives across a 100+ format
project. Useful when chasing cross-references like "id
631 is referenced by WGRP.mapId — where is it actually
defined?"

Optional --magic <WXXX> filter narrows the search to one
format family. Necessary because primary-key id ranges
overlap across formats (id=200 might be both a WCMG
group and a WGRP composition); without the filter the
operator gets all collisions, which is itself useful
for spotting unintentional id reuse.

Auto-detects per-file format magic, skips files with
unknown magic and files whose format has no --info-*
surface (asset formats like .wom that aren't catalog-
shaped). Re-uses the same primary-key auto-discovery
+ external-ref filter as --catalog-pluck. Both
utilities should grow into a shared helper header once
a third utility needs the same lookup logic — for now
a noted duplication.

CLI flag count 1133 -> 1134.

tools/editor/cli_arg_required.cpp

@@ -137,7 +137,7 @@ const char* const kArgRequired[] = {
     "--info-magic", "--summary-dir", "--rename-by-magic",
     "--bulk-rename-by-magic", "--touch-tree", "--tree-summary-md",
     "--catalog-grep", "--diff-headers", "--audit-tree",
-    "--catalog-pluck",
+    "--catalog-pluck", "--catalog-find",
     "--magic-fix", "--bulk-validate",
     "--bulk-export-json", "--bulk-import-json",
     "--diff-tree", "--orphan-jsons", "--list-by-magic",