mh_lint: add page (#7911)

pages/common/mh_lint.md

@@ -0,0 +1,21 @@
+# mh_lint
+
+> Attempt to find bugs in MATLAB or Octave code.
+> Please note that this tool is neither sound nor complete.
+> More information: <https://misshit.org>.
+
+- Check the current directory:
+
+`mh_lint`
+
+- Check a specific directory recursively:
+
+`mh_lint {{path/to/directory}}`
+
+- Check a MATLAB file:
+
+`mh_lint {{path/to/file.m}}`
+
+- Check an Octave file:
+
+`mh_lint --octave {{path/to/file.m}}`