Ignore '/docs' on some GH actions, give docs its own action (#10949)

* ignore docs on several actions, give docs its own action

* Random doc change to see if the new action runs.

* umm... not paths-ignore, paths!

* eof fix

* enabling typescript checking on docs

.github/workflows/superset-python.yml

@@ -1,7 +1,13 @@
 # Python unit tests
 name: Python
 
-on: [push, pull_request]
+on:
+  push:
+    paths-ignore:
+      - 'docs/**'
+  pull_request:
+    paths-ignore:
+      - 'docs/**'
 
 jobs:
   lint: