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-net-gateway-check-port.1

@@ -0,0 +1,22 @@
+.ie \n(.g .ds Aq \(aq
+.el .ds Aq '
+.TH start-cli-net-gateway-check-port 1  "check-port " 
+.SH NAME
+start\-cli\-net\-gateway\-check\-port \- about.check\-port\-reachability
+.SH SYNOPSIS
+\fBstart\-cli net gateway check\-port\fR [\fB\-\-format\fR] [\fB\-h\fR|\fB\-\-help\fR] <\fIPORT\fR> <\fIGATEWAY\fR> 
+.SH DESCRIPTION
+about.check\-port\-reachability
+.SH OPTIONS
+.TP
+\fB\-\-format\fR
+
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+Print help
+.TP
+<\fIPORT\fR>
+help.arg.port
+.TP
+<\fIGATEWAY\fR>
+Gateway identifier