feat(marketplace): hook migration, projman commands, optimizations [BREAKING]

Remove all SessionStart and PostToolUse hooks across the marketplace,
retaining only PreToolUse safety hooks and UserPromptSubmit quality hooks.
Add /project and /adr command families, /hygiene check, /cv status.
Create 7 new projman skills for project lifecycle management.
Remove /pm-debug, /suggest-version, /proposal-status commands.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

plugins/projman/commands/adr-supersede.md

@@ -0,0 +1,25 @@
+---
+description: Mark an ADR as superseded by a newer ADR
+agent: planner
+---
+
+# /adr supersede
+
+## Skills Required
+
+- skills/adr-conventions.md — ADR lifecycle
+- skills/wiki-conventions.md — page naming
+
+## Workflow
+
+### Step 1: Validate
+Verify both ADRs exist. The superseding ADR should be in `Accepted` or `Proposed` state.
+
+### Step 2: Update Old ADR
+Set status to `Superseded`. Add note: "Superseded by ADR-MMMM: {Title}".
+
+### Step 3: Update New ADR
+Add note: "Supersedes ADR-NNNN: {Title}".
+
+### Step 4: Update ADR Index
+Move old ADR to "Superseded" section.