Add jamie-copy-trimmer (48) and dintel-campaign-designer (78) skills

Import two skills authored in Claude Cowork: jamie-copy-trimmer as a
root-only Jamie skill, and campaign-gate-process as dintel-campaign-designer
with full D.intelligence Agent Corps packaging (code/desktop/shared,
agent-id 78, Draft & Wait autonomy) since it now sits inside the 70-79
block. Bumps the corps roster count to 9 agents + 1 meta-agent across all
sibling skills and registers #78 in the shared USER-GUIDE/README. Also adds
.claude/commands wrappers and ~/.claude/skills symlinks so both are usable.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

custom-skills/75-dintel-marketing-mgr/SKILL.md

@@ -12,7 +12,7 @@ version: 1.1.0
 last_updated: 2026-05-18
 canon_compliance: v1.3
 agent-id: "75"
-agent-corps: D.intelligence Agent Corps (8 agents + 1 meta-agent)
+agent-corps: D.intelligence Agent Corps (9 agents + 1 meta-agent)
 autonomy: draft-and-wait
 ---