feat(lang): add CFML / ColdFusion support (cfscript + tag dialects)

Vendor the MIT-licensed cfmleditor/tree-sitter-cfml grammars and wire both
CFML dialects through the pipeline:

- .cfc components -> cfscript grammar (CBM_LANG_CFSCRIPT): a JS-like grammar, so
  function/method declarations, calls and imports extract with the shared JS/TS
  arrays. Components' functions become Function nodes.
- .cfm templates -> cfml tag grammar (CBM_LANG_CFML): tag-based (HTML-derived).
  Embedded <cfscript> functions extract via function_declaration; tag-based
  <cffunction name="..."> nodes are handled by a dedicated walker branch that
  reads the name attribute (cf_function_tag has no name field). Shared scanner
  headers are vendored at vendored/common/ so the grammar's ../../common/
  includes resolve without editing vendored sources.

Adds an ASCII case-insensitive compare for CFML's case-insensitive attributes.
Tests cover both dialects and the extension mapping. LICENSEs vendored.

Closes #38