git-bug, git-cola, gitlint: add page (#6444)

pages/common/gitlint.md

@@ -0,0 +1,28 @@
+# gitlint
+
+> Git commit message linter checks your commit messages for style.
+> More information: <https://jorisroovers.com/gitlint/>.
+
+- Check the last commit message:
+
+`gitlint`
+
+- The range of commits to lint:
+
+`gitlint --commits {{single_refspec_argument}}`
+
+- Path to a directory or python module with extra user-defined rules:
+
+`gitlint --extra-path {{path/to/directory}}`
+
+- Start a specific CI job:
+
+`gitlint --target {{path/to/target_directory}}`
+
+- Path to a file containing a commit-msg:
+
+`gitlint --msg-filename {{path/to/filename}}`
+
+- Read staged commit meta-info from the local repository:
+
+`gitlint --staged`