[CI] Add pre-commit-config to internal source of truth

MODULAR_ORIG_COMMIT_REV_ID: 14e2678c27e07378a49cdfcae41feae5b7c27fb6

.pre-commit-config.yaml

@@ -0,0 +1,26 @@
+repos:
+  - repo: local
+    hooks:
+      - id: mojo-format
+        name: mojo-format
+        entry: mojo format mojo
+        language: system
+        files: '\.(mojo|🔥|py)$'
+        stages: [commit]
+      - id: check-docstrings
+        name: check-docstrings
+        entry: python3 ./mojo/stdlib/scripts/check-docstrings.py
+        language: system
+        pass_filenames: false
+        stages: [commit]
+      - id: check-license
+        name: check-license
+        entry: mojo mojo/stdlib/scripts/check_licenses.mojo
+        language: system
+        files: '\.(mojo|🔥|py)$'
+        stages: [commit]
+  - repo: https://github.com/igorshubovych/markdownlint-cli
+    rev: v0.40.0
+    hooks:
+    - id: markdownlint
+      args: ['--config', 'mojo/stdlib/scripts/.markdownlint.yaml', '--fix']

mojo/stdlib/scripts/check-docstrings.py

@@ -27,7 +27,7 @@ def main():
         "--diagnose-missing-doc-strings",
         "-o",
         "/dev/null",
-        "./stdlib/src",
+        "./mojo/stdlib/src",
     ]
     result = subprocess.run(command, capture_output=True)
     if result.stderr or result.returncode != 0: