git lfs: add page (#3302)

pages/common/git-lfs.md

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+# git lfs
+
+> Work with large files in Git repositories.
+> More information: <https://git-lfs.github.com>.
+
+- Initialise Git LFS:
+
+`git lfs install`
+
+- Track files that match a glob:
+
+`git lfs track '{{*.bin}}'`
+
+- Change the Git LFS endpoint URL (useful if the LFS server is separate from the Git server):
+
+`git config -f .lfsconfig lfs.url {{lfs_endpoint_url}}`
+
+- List tracked patterns:
+
+`git lfs track`
+
+- List tracked files that have been commited:
+
+`git lfs ls-files`
+
+- Push all LFS objects to the remote server (useful if errors are encountered):
+
+`git lfs push --all {{remote_name}} {{branch_name}}`