feat(Agente 1): Implement FX Creator MCP Tools (T031-T035)

- Add 5 new MCP tools to server.py:
  * create_riser (T031) - Pre-drop buildup effect
  * create_downlifter (T032) - Post-drop energy release
  * create_impact (T033) - Hit, crash, sub_drop, noise impacts
  * create_silence (T034) - Break/silence effects
  * create_fx_section (T035) - Complete FX sections

- Add 5 handlers to __init__.py for Remote Script execution
- Update skill_produccion_audio.md with FX tools documentation

All tools exposed and ready for professional FX generation.

Closes Agente 1 of 20 - FX Creator implementation

docs/skill_produccion_audio.md

@@ -67,7 +67,64 @@ ableton-live-mcp_create_arrangement_audio_pattern(
 )
 ```
 
-### Paso 5: Verificación Visual
+### Paso 5: FX y Transiciones Profesionales (T031-T035)
+
+#### Crear Riser/Buildup (T031)
+```python
+# Riser de 8 compases antes del drop
+ableton-live-mcp_create_riser(
+    track_index=7,
+    start_bar=24,      # Empezar en compás 24
+    duration=8,        # 8 compases de duración
+    intensity=0.8,   # Intensidad 80%
+    pitch_min=36,      # C2
+    pitch_max=84       # C6
+)
+```
+
+#### Crear Downlifter (T032)
+```python
+# Downlifter post-drop
+ableton-live-mcp_create_downlifter(
+    track_index=7,
+    start_bar=32,      # Después del drop
+    duration=4,
+    intensity=0.7
+)
+```
+
+#### Crear Impact FX (T033)
+```python
+# Impact en el drop
+ableton-live-mcp_create_impact(
+    track_index=7,
+    position=32,       # Compás 32
+    intensity=1.0,
+    impact_type="hit"  # Options: "hit", "crash", "sub_drop", "noise"
+)
+```
+
+#### Crear Sección FX Completa (T035)
+```python
+# Sección completa con riser + impact
+ableton-live-mcp_create_fx_section(
+    section_type="pre_drop",  # "pre_drop", "post_drop", "transition", "build"
+    start_bar=24,
+    duration=8
+)
+```
+
+#### Silence/Break Effect (T034)
+```python
+# Break de 1 compás para tensión
+ableton-live-mcp_create_silence(
+    track_index=0,
+    start_bar=31,
+    duration=1
+)
+```
+
+### Paso 6: Verificación Visual
 ```python
 # Confirmar clips en Arrangement View
 ableton-live-mcp_get_arrangement_status