refactor(skills): rename multi-agent-* + agent-sessions-monitor + delegate-job to tmux-agent-orchestrate-*

Renamed 6 skills directories to tmux-agent-orchestrate-* prefix:
- multi-agent-create → tmux-agent-orchestrate-create
- multi-agent-resume → tmux-agent-orchestrate-resume
- multi-agent-delete → tmux-agent-orchestrate-delete
- multi-agent-status → tmux-agent-orchestrate-status
- agent-sessions-monitor → tmux-agent-orchestrate-monitor
- delegate-job → tmux-agent-orchestrate-delegate-job

Updated:
- skills/lib.sh internal paths (delegate_submit_job etc.)
- skills/tmux-agent-orchestrate-status/scripts/status.sh (monitor path)
- skills/tmux-agent-orchestrate-monitor/scripts/reconcile.sh
- .gitignore (HTML ignore patterns)
- 6 SKILL.md frontmatter (name, related_skills, prereq_skills) and body
- All script headers and Korean comments

Notes:
- tmux session naming convention unchanged (<slug>-creator-<agent>) — workspace identifier based, kept for backward compatibility
- Existing 2 sessions in -L multi-agent-canary untouched
- YAML delegate_job_id / agent-session (tmux:canary-...) preserved for log history compatibility

Verified on isolated server -L agy-rename-test (kill-server after).

skills/lib.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-# lib.sh — shared library for the multi-agent-* / agent-sessions-* skills.
+# lib.sh — shared library for the tmux-agent-orchestrate-* skills.
 #
 # Single source of truth for the four things that were inconsistently
 # re-implemented across create/resume/delete/monitor (REVIEW.md §4.1):
@@ -362,7 +362,7 @@ PYEOF
 }
 
 # ---------------------------------------------------------------------------
-# delegate-job integration helpers
+# tmux-agent-orchestrate-delegate-job integration helpers
 #
 # All paths are resolved relative to lib.sh's own location (BASH_SOURCE), so the
 # skill tree is relocatable — no hardcoded absolute paths (review item 6).
@@ -381,26 +381,26 @@ _delegate_py_bin() {
   printf '%s\n' "python3"
 }
 
-# _delegate_script <name> — echo the path to a delegate-job script, resolved
+# _delegate_script <name> — echo the path to a tmux-agent-orchestrate-delegate-job script, resolved
 # relative to skills/ (lib.sh dir). Empty if not found.
 _delegate_script() {
   local name="$1" skill_dir cand
   skill_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-  cand="$skill_dir/delegate-job/scripts/$name"
+  cand="$skill_dir/tmux-agent-orchestrate-delegate-job/scripts/$name"
   if [ -f "$cand" ]; then printf '%s\n' "$cand"; return 0; fi
   printf '%s\n' "$(find "$skill_dir" -name "$name" 2>/dev/null | head -n 1 || true)"
 }
 
 # delegate_submit_job <prompt> <agent> <agent_session>
 #
-# Register a job in the delegate-job registry. Prints the new JID on stdout.
+# Register a job in the tmux-agent-orchestrate-delegate-job registry. Prints the new JID on stdout.
 delegate_submit_job() {
   local prompt="$1" agent="$2" session="$3"
   local py_bin registry_py
   py_bin="$(_delegate_py_bin)"
   registry_py="$(_delegate_script registry.py)"
   if [ -z "$registry_py" ] || [ ! -f "$registry_py" ]; then
-    echo "ERROR: delegate-job registry.py not found under skills/" >&2
+    echo "ERROR: tmux-agent-orchestrate-delegate-job registry.py not found under skills/" >&2
     return 1
   fi
   "$py_bin" "$registry_py" register \
@@ -411,7 +411,7 @@ delegate_submit_job() {
 
 # delegate_publish_event <job_id> <event> [detail]
 #
-# Publish a lifecycle event to the delegate-job registry. Consolidates the
+# Publish a lifecycle event to the tmux-agent-orchestrate-delegate-job registry. Consolidates the
 # inline .venv-walk + publish_event.py blocks that were duplicated across
 # create/delete/resume (review item 7). Non-fatal by contract: an empty job id,
 # a missing script, or a broker failure never aborts the caller.