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-tunnel-add.1

@@ -0,0 +1,35 @@
+.ie \n(.g .ds Aq \(aq
+.el .ds Aq '
+.TH start-cli-net-tunnel-add 1  "add " 
+.SH NAME
+start\-cli\-net\-tunnel\-add \- Add a new tunnel
+.SH SYNOPSIS
+\fBstart\-cli net tunnel add\fR [\fB\-\-set\-as\-default\-outbound\fR] [\fB\-h\fR|\fB\-\-help\fR] <\fINAME\fR> <\fICONFIG\fR> [\fIGATEWAY_TYPE\fR] 
+.SH DESCRIPTION
+Add a new tunnel
+.SH OPTIONS
+.TP
+\fB\-\-set\-as\-default\-outbound\fR
+help.arg.set\-as\-default\-outbound
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+Print help
+.TP
+<\fINAME\fR>
+Tunnel name
+.TP
+<\fICONFIG\fR>
+WireGuard configuration
+.TP
+[\fIGATEWAY_TYPE\fR]
+help.arg.gateway\-type
+.br
+
+.br
+\fIPossible values:\fR
+.RS 14
+.IP \(bu 2
+inbound\-outbound
+.IP \(bu 2
+outbound\-only
+.RE