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-dns.1

@@ -0,0 +1,23 @@
+.ie \n(.g .ds Aq \(aq
+.el .ds Aq '
+.TH start-cli-net-dns 1  "dns " 
+.SH NAME
+start\-cli\-net\-dns \- Manage and query DNS
+.SH SYNOPSIS
+\fBstart\-cli net dns\fR [\fB\-h\fR|\fB\-\-help\fR] <\fIsubcommands\fR>
+.SH DESCRIPTION
+Manage and query DNS
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+Print help
+.SH SUBCOMMANDS
+.TP
+start\-cli\-net\-dns\-dump\-table(1)
+Dump address resolution table
+.TP
+start\-cli\-net\-dns\-query(1)
+Test DNS configuration for a domain
+.TP
+start\-cli\-net\-dns\-set\-static(1)
+Set static DNS servers