[mod] add test.pyright to test & ci.test targets

Since we currently have many type checking errors,
we for now only test with typeCheckingMode: off
which makes pyright only check files that contain a comment:

    # pyright: basic

to enable basic type checking, or

    # pyright: strict

to enable strict type checking.

pyrightconfig-ci.json

@@ -0,0 +1,10 @@
+{
+    "venvPath": "local",
+    "venv": "py3",
+    "include": [
+        "searx",
+        "searxng_extra",
+        "tests"
+    ],
+    "typeCheckingMode": "off"
+}