feat: add 'hermes dump' command for copy-pasteable setup summary (#6550)

Adds a new CLI command that outputs a compact, plain-text dump of the
user's Hermes setup — version, OS, model/provider, API key presence,
toolsets, gateway status, platforms, cron jobs, skills, and any
non-default config overrides.

Designed for support context: no ANSI colors, ready to paste into
Discord/GitHub/Telegram. Secrets shown as 'set/not set' by default;
--show-keys reveals redacted prefixes (first/last 4 chars).

Files:
- hermes_cli/dump.py (new) — run_dump() implementation
- hermes_cli/main.py — parser + cmd_dump wiring
- hermes_cli/profiles.py — shell completions + subcommand set

hermes_cli/main.py

@@ -2643,6 +2643,12 @@ def cmd_doctor(args):
     run_doctor(args)
 
 
+def cmd_dump(args):
+    """Dump setup summary for support/debugging."""
+    from hermes_cli.dump import run_dump
+    run_dump(args)
+
+
 def cmd_config(args):
     """Configuration management."""
     from hermes_cli.config import config_command
@@ -4724,6 +4730,22 @@ For more help on a command:
         help="Attempt to fix issues automatically"
     )
     doctor_parser.set_defaults(func=cmd_doctor)
+
+    # =========================================================================
+    # dump command
+    # =========================================================================
+    dump_parser = subparsers.add_parser(
+        "dump",
+        help="Dump setup summary for support/debugging",
+        description="Output a compact, plain-text summary of your Hermes setup "
+                    "that can be copy-pasted into Discord/GitHub for support context"
+    )
+    dump_parser.add_argument(
+        "--show-keys",
+        action="store_true",
+        help="Show redacted API key prefixes (first/last 4 chars) instead of just set/not set"
+    )
+    dump_parser.set_defaults(func=cmd_dump)
     
     # =========================================================================
     # config command