ww: lift introspection files to lib/ww/ (ast, lex, tok, parse, typ, sym)

cmd/ww/main.c

@@ -115,7 +115,7 @@ locate_import(const char *dirs, const char *name, char *out, size_t outsz)
 
 /* module_of — pick the source's containing-directory basename.
  * lib/os/os.ww      -> "os"
- * selfhost/cmd/wcc/sym.ww -> "wcc"
+ * lib/ww/sym.ww      -> "ww"
  * bare "main.ww"    -> "main"
  * Writes into dst (size ≥ 1); always NUL-terminates. */
 static void