Add pytest markers to pytest.ini (?)

pytest.ini

@@ -1,2 +1,14 @@
 [pytest]
 addopts = --snapshot-patch-pycharm-diff
+# this shouldn't be necessary since it's already in pyproject.toml
+# but tests show lots of warnings without it
+markers =
+  clojure: language server running for Clojure
+  python: language server running for Python
+  go: language server running for Go
+  java: language server running for Java
+  rust: language server running for Rust
+  typescript: language server running for TypeScript
+  php: language server running for PHP
+  snapshot: snapshot tests for symbolic editing operations
+  isolated_process: test runs with process isolated agent