chore: import upstream snapshot with attribution

examples/snippets/servers/notifications.py

@@ -0,0 +1,18 @@
+from mcp.server.mcpserver import Context, MCPServer
+
+mcp = MCPServer(name="Notifications Example")
+
+
+@mcp.tool()
+async def process_data(data: str, ctx: Context) -> str:
+    """Process data with logging."""
+    # Different log levels
+    await ctx.debug(f"Debug: Processing '{data}'")  # pyright: ignore[reportDeprecated]
+    await ctx.info("Info: Starting processing")  # pyright: ignore[reportDeprecated]
+    await ctx.warning("Warning: This is experimental")  # pyright: ignore[reportDeprecated]
+    await ctx.error("Error: (This is just a demo)")  # pyright: ignore[reportDeprecated]
+
+    # Notify about resource changes
+    await ctx.session.send_resource_list_changed()
+
+    return f"Processed: {data}"