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-container/start-container-echo.1

@@ -0,0 +1,15 @@
+.ie \n(.g .ds Aq \(aq
+.el .ds Aq '
+.TH start-container-echo 1  "echo " 
+.SH NAME
+start\-container\-echo
+.SH SYNOPSIS
+\fBstart\-container echo\fR [\fB\-h\fR|\fB\-\-help\fR] <\fIMESSAGE\fR> 
+.SH DESCRIPTION
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+Print help
+.TP
+<\fIMESSAGE\fR>
+Message to echo back