feat(profile): list counters + grouped show + --plain parse mode

list: ITEMS column with compact per-category counts (e.g. 12s·1p·1m·1c),
left block aligned; full descriptions kept (CLI output, not 80-strict).
show: grouped by type (gstack/external/personal/plugin/mcp/cli) with
status; redundant per-line TYPE column and plugin marketplace suffix dropped.
show --plain: parsable "type<TAB>name" list, no status, zero claude calls —
the contract for the upcoming design gate. All derived from .profile files.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01X3e8LaH2vymmxyh36h3jFU

skills/profile/SKILL.md

@@ -108,8 +108,8 @@ bash "$HOME/.claude/lib/profile.sh" $ARGUMENTS
   moved + tell the user to start a new Claude session to pick up the changes
   (Claude scans `skills/` at session start).
 - After `current`: report the active profile + match percentage.
-- After `show`: render the table directly — no extra commentary unless the user
-  asks.
+- After `show`: render the grouped output directly — no extra commentary unless
+  the user asks.
 
 ## Tradeoffs to mention if asked