Add (name :as type) annotation syntax for defcomp params

parse-comp-params now recognizes (name :as type) — a 3-element list
with :as keyword separator. Type annotations are stored on the
Component via component-param-types and used by types.sx for call-site
checking. Unannotated params default to any. 428/428 tests pass (50
types tests including 6 annotation tests).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

shared/sx/ref/bootstrap_py.py

@@ -142,6 +142,8 @@ class PyEmitter:
             "component-has-children?": "component_has_children",
             "component-name": "component_name",
             "component-affinity": "component_affinity",
+            "component-param-types": "component_param_types",
+            "component-set-param-types!": "component_set_param_types",
             "macro-params": "macro_params",
             "macro-rest-param": "macro_rest_param",
             "macro-body": "macro_body",