feat: add assistant bot with LLM integration and configuration

- Implemented the assistant bot with basic command handling and LLM routing.
- Created configuration file for the assistant bot with personality, behavior, and LLM settings.
- Added system prompt for the assistant bot to define its capabilities and limitations.
- Developed registration script for creating Matrix bot users via Synapse admin API.
- Introduced common development scripts for agent management (start, stop, list, logs).
- Scaffolded new agent creation script to streamline the addition of new agents.
- Implemented agent removal script to disable agents without deleting data.

dev-scripts/stop.sh

@@ -0,0 +1,45 @@
+#!/usr/bin/env bash
+# stop.sh — detiene uno o todos los agentes en ejecución
+#
+# Uso:
+#   ./dev-scripts/stop.sh                   # detiene todos los que estén corriendo
+#   ./dev-scripts/stop.sh assistant-bot     # detiene uno específico
+
+source "$(dirname "$0")/_common.sh"
+
+TARGET="${1:-}"
+stopped=0
+
+while IFS='|' read -r id _version _enabled _desc _cfg; do
+  [[ -n "$TARGET" && "$id" != "$TARGET" ]] && continue
+
+  if ! is_running "$id"; then
+    dim "  $id  (no está corriendo)"
+    continue
+  fi
+
+  local_pid="$(read_pid "$id")"
+  kill -TERM "$local_pid" 2>/dev/null || true
+
+  # Espera hasta 5s a que muera limpiamente
+  for _ in {1..10}; do
+    kill -0 "$local_pid" 2>/dev/null || break
+    sleep 0.5
+  done
+
+  # SIGKILL si todavía sigue vivo
+  if kill -0 "$local_pid" 2>/dev/null; then
+    warn "$id  no respondió a SIGTERM, enviando SIGKILL..."
+    kill -9 "$local_pid" 2>/dev/null || true
+  fi
+
+  rm -f "$(pid_file "$id")"
+  ok "$id  detenido  (PID $local_pid)"
+  ((stopped++)) || true
+
+done < <(list_agents_raw)
+
+[[ "$stopped" -eq 0 && -z "$TARGET" ]] && dim "Ningún agente estaba corriendo."
+[[ -n "$TARGET" && "$stopped" -eq 0 ]] && fail "Agente '$TARGET' no encontrado o no estaba corriendo."
+
+true