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

pages/common/git-bug.md

@@ -0,0 +1,33 @@
+# git bug
+
+> A distributed bug tracker that uses git's internal storage, so no files are added in your project.
+> You may submit your problems to the same git remote you use to interact with others, much like commits and branches.
+> More information: <https://github.com/MichaelMure/git-bug/blob/master/doc/md/git-bug.md>.
+
+- Create a new identity:
+
+`git bug user create`
+
+- Create a new bug:
+
+`git bug add`
+
+- You can push your new entry to a remote:
+
+`git bug push`
+
+- You can pull for updates:
+
+`git bug pull`
+
+- List existing bugs:
+
+`git bug ls`
+
+- Filter and sort bugs using a query:
+
+`git bug ls "{{status}}:{{open}} {{sort}}:{{edit}}"`
+
+- Search for bugs by text content:
+
+`git bug ls "{{search_query}}" baz`