vela: add page (#4942)

pages/common/vela.md

@@ -0,0 +1,16 @@
+# vela
+
+> Command line tools for the Vela pipeline.
+> More information: <https://go-vela.github.io/docs/cli/>.
+
+- Trigger a pipeline to run from a git branch, commit or tag:
+
+`vela add deployment --org {{organization}} --repo {{repository_name}} --target {{environment}} --ref {{branch|commit|refs/tags/git_tag}} --description "{{deploy_description}}"`
+
+- List deployments for a repository:
+
+`vela get deployment --org {{organization}} --repo {{repository_name}}`
+
+- Inspect a specific deployment:
+
+`vela view deployment --org {{organization}} --repo {{repository_name}} --deployment {{deployment_number}}`