Common subcommand naming scheme (#208)

drop tea mile alias

document command schema in CONTRIBUTING.md

and update this file, its a plain copy from gitea

add "list" as alias for "ls" subcommand

add singular command aliases

Co-authored-by: Norwin Roosen <git@nroo.de>
Reviewed-on: https://gitea.com/gitea/tea/pulls/208
Reviewed-by: 6543 <6543@noreply.gitea.io>
Reviewed-by: techknowlogick <techknowlogick@gitea.io>

cmd/releases.go

@@ -14,8 +14,8 @@ import (
 // CmdReleases represents to login a gitea server.
 // ToDo: ReleaseDetails
 var CmdReleases = cli.Command{
-	Name:        "release",
-	Aliases:     []string{"releases"},
+	Name:        "releases",
+	Aliases:     []string{"release"},
 	Usage:       "Manage releases",
 	Description: "Manage releases",
 	Action:      releases.RunReleasesList,