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-notification-mark-seen.1

@@ -0,0 +1,16 @@
+.ie \n(.g .ds Aq \(aq
+.el .ds Aq '
+.TH start-cli-notification-mark-seen 1  "mark-seen " 
+.SH NAME
+start\-cli\-notification\-mark\-seen \- Mark notifications as seen
+.SH SYNOPSIS
+\fBstart\-cli notification mark\-seen\fR [\fB\-h\fR|\fB\-\-help\fR] [\fIIDS\fR] 
+.SH DESCRIPTION
+Mark notifications as seen
+.SH OPTIONS
+.TP
+\fB\-h\fR, \fB\-\-help\fR
+Print help
+.TP
+[\fIIDS\fR]
+Notification IDs