feat(branch): branch from tags and commits, protect with explicit rules

branch create --source v1.0.0 (or a commit) failed with "The old branch
does not exist" because only old_branch_name was sent; the request now
sends old_ref_name, through a raw call until the SDK has the field.

branch protect nope exited 0 and created a rule for a missing branch,
and protecting twice failed with "permission denied". Branches must now
exist (--pattern protects a glob instead), an existing rule warns
"! main is already protected", and unprotecting an unprotected branch
warns instead of failing. The rule is explained in help and set with
--required-approvals, --allow-push, --status-check,
--block-on-rejected-reviews and --dismiss-stale-approvals.

branch list shows NAME (marking the default branch), COMMIT, PROTECTED,
UPDATED and MESSAGE, branch view is a full view with --web, branch
delete takes several branches, and every change reports a ✓ line.

Signed-off-by: bircni <bircni@icloud.com>

internal/app/organizations.go

@@ -52,13 +52,6 @@ func timeField(label, raw string, d terminal.Display) terminal.Field {
 	return terminal.Field{Label: label, Value: terminal.RelativeTime(now, t)}
 }
 
-func yesNo(value bool) string {
-	if value {
-		return "yes"
-	}
-	return "no"
-}
-
 // countOf words a count, such as "1 member" or "2 members".
 func countOf(n int, singular, plural string) string {
 	if n == 1 {