fix: phase directory matching and orphaned references

- Support both zero-padded (05-*) and unpadded (5-*) phase folders
- Delete orphaned research-subagent-prompt.md template
- Update resume-project.md to use Task tool resume parameter

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

get-shit-done/workflows/execute-phase.md

@@ -39,7 +39,9 @@ Options:
 Confirm phase exists and has plans:
 
 ```bash
-PHASE_DIR=$(ls -d .planning/phases/${PHASE_ARG}* 2>/dev/null | head -1)
+# Match both zero-padded (05-*) and unpadded (5-*) folders
+PADDED_PHASE=$(printf "%02d" ${PHASE_ARG} 2>/dev/null || echo "${PHASE_ARG}")
+PHASE_DIR=$(ls -d .planning/phases/${PADDED_PHASE}-* .planning/phases/${PHASE_ARG}-* 2>/dev/null | head -1)
 if [ -z "$PHASE_DIR" ]; then
   echo "ERROR: No phase directory matching '${PHASE_ARG}'"
   exit 1