fix: clap CLI definitions and manpage generation

- add #[group(skip)] to all Parser-derived structs
- fix conflicts_with and arg definitions for correct CLI behavior
- refactor bin entry points to support manpage generation

core/man/start-cli/start-cli-package-set-outbound-gateway.1

@@ -0,0 +1,19 @@
+.ie \n(.g .ds Aq \(aq
+.el .ds Aq '
+.TH start-cli-package-set-outbound-gateway 1  "set-outbound-gateway " 
+.SH NAME
+start\-cli\-package\-set\-outbound\-gateway \- about.set\-outbound\-gateway\-package
+.SH SYNOPSIS
+\fBstart\-cli package set\-outbound\-gateway\fR [\fB\-h\fR|\fB\-\-help\fR] <\fIPACKAGE\fR> [\fIGATEWAY\fR] 
+.SH DESCRIPTION
+about.set\-outbound\-gateway\-package
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+Print help
+.TP
+<\fIPACKAGE\fR>
+Package identifier
+.TP
+[\fIGATEWAY\fR]
+Gateway identifier