feat: add get_available_networks and update UI

- Add pandapower_get_available_networks wrapper function
- Add 'List Networks' tab in Gradio interface
- Update documentation with new tool

app.py

@@ -11,6 +11,7 @@ from pandapower_tools import (
     PANDAPOWER_AVAILABLE,
     create_empty_network as pp_create_empty,
     create_test_network as pp_create_test,
+    get_available_networks as pp_get_networks,
     run_power_flow as pp_run_pf,
     run_dc_power_flow as pp_run_dc,
     get_network_info as pp_get_info,
@@ -109,6 +110,11 @@ def pandapower_get_available_std_types() -> str:
     return json.dumps(pp_std_types(), indent=2)
 
 
+def pandapower_get_available_networks() -> str:
+    """Get a list of all available pandapower test networks."""
+    return json.dumps(pp_get_networks(), indent=2)
+
+
 def pypsa_create_network(name: str = "PyPSA Network") -> str:
     """Create a new PyPSA network."""
     return json.dumps(pypsa_create(name), indent=2)
@@ -127,6 +133,7 @@ def get_available_tools() -> str:
             "tools": [
                 "pandapower_create_empty_network",
                 "pandapower_create_test_network",
+                "pandapower_get_available_networks",
                 "pandapower_run_power_flow",
                 "pandapower_run_dc_power_flow",
                 "pandapower_get_network_info",
@@ -163,10 +170,18 @@ iface_pp_create_empty = gr.Interface(
 iface_pp_create_test = gr.Interface(
     fn=pandapower_create_test_network,
     inputs=[gr.Textbox(label="Network Type", value="case9",
-                       info="Options: case9, case14, case30, case39, case57, case118, etc.")],
+                       info="Use pandapower_get_available_networks to see all options. Examples: case9, case14, case30, case39, case57, case118, create_cigre_network_hv, iceland, GBnetwork, etc.")],
     outputs=gr.Textbox(label="Result"),
     title="Create Test Network",
-    description="Create a standard IEEE test network"
+    description="Create a standard IEEE test network or other built-in pandapower network"
+)
+
+iface_pp_get_networks = gr.Interface(
+    fn=pandapower_get_available_networks,
+    inputs=[],
+    outputs=gr.Textbox(label="Result"),
+    title="Get Available Networks",
+    description="Get a list of all available pandapower test networks"
 )
 
 iface_pp_run_pf = gr.Interface(
@@ -356,10 +371,10 @@ with gr.Blocks(title="PowerMCP Server") as demo:
     
     with gr.Tab("🔧 Pandapower Tools"):
         gr.TabbedInterface(
-            [iface_pp_create_empty, iface_pp_create_test, iface_pp_run_pf, iface_pp_run_dc,
+            [iface_pp_create_empty, iface_pp_create_test, iface_pp_get_networks, iface_pp_run_pf, iface_pp_run_dc,
              iface_pp_get_info, iface_pp_add_bus, iface_pp_add_line, iface_pp_add_load,
              iface_pp_add_gen, iface_pp_add_ext_grid, iface_pp_contingency, iface_pp_std_types],
-            ["Create Empty", "Create Test", "AC Power Flow", "DC Power Flow",
+            ["Create Empty", "Create Test", "List Networks", "AC Power Flow", "DC Power Flow",
              "Get Info", "Add Bus", "Add Line", "Add Load", "Add Gen", "Add Ext Grid",
              "Contingency", "Std Types"]
         )
@@ -393,7 +408,8 @@ with gr.Blocks(title="PowerMCP Server") as demo:
         | Tool | Description |
         |------|-------------|
         | `pandapower_create_empty_network` | Create an empty network |
-        | `pandapower_create_test_network` | Create IEEE test networks |
+        | `pandapower_create_test_network` | Create IEEE test networks (all pandapower networks supported) |
+        | `pandapower_get_available_networks` | List all available test networks |
         | `pandapower_run_power_flow` | Run AC power flow |
         | `pandapower_run_dc_power_flow` | Run DC power flow |
         | `pandapower_get_network_info` | Get network information |