Add Go AST analysis tools and refactor to use common walk code

go.mod

@@ -1,5 +1,13 @@
 module github.com/flamingcow/gocp
 
-go 1.21
+go 1.23.2
 
-require github.com/mark3labs/mcp-go v0.1.0
+toolchain go1.24.4
+
+require github.com/mark3labs/mcp-go v0.32.0
+
+require (
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/spf13/cast v1.7.1 // indirect
+	github.com/yosida95/uritemplate/v3 v3.0.2 // indirect
+)