feat(0013): wire extract_panel into main + CMakeLists + app.md

- main.cpp: registra panel_extract en g_panels[], llama
  extract_panel_init tras jobs_init y extract_panel_shutdown en el
  cleanup, anade extract_panel_render(g_app) al render.
- CMakeLists.txt: anade extract_panel.cpp al target.
- app.md: declara extract_iocs_py_cybersecurity y
  extract_graph_hybrid_py_pipelines en uses_functions (regla
  uses_functions.md).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

app.md

@@ -30,6 +30,10 @@ uses_functions:
   - fullscreen_window_cpp_core
   - badge_cpp_core
   - empty_state_cpp_core
+  # paste & extract panel (issue 0013) — invoca enrichers/paste_extract/run.py
+  # via subprocess directo (no via jobs); uses extract_iocs + opcional hybrid.
+  - extract_iocs_py_cybersecurity
+  - extract_graph_hybrid_py_pipelines
 uses_types: []
 framework: "imgui"
 entry_point: "main.cpp"