Add AST analysis tools and go run/test execution tools

tool_go_common.go

@@ -0,0 +1,25 @@
+package main
+
+import (
+	"bytes"
+	"os/exec"
+)
+
+// runCommand executes a command and returns stdout, stderr, exit code, and error
+func runCommand(cmd *exec.Cmd) (stdout, stderr string, exitCode int, err error) {
+	var stdoutBuf, stderrBuf bytes.Buffer
+	cmd.Stdout = &stdoutBuf
+	cmd.Stderr = &stderrBuf
+
+	err = cmd.Run()
+	
+	exitCode = 0
+	if err != nil {
+		if exitErr, ok := err.(*exec.ExitError); ok {
+			exitCode = exitErr.ExitCode()
+			err = nil // Don't treat non-zero exit as error for go commands
+		}
+	}
+
+	return stdoutBuf.String(), stderrBuf.String(), exitCode, err
+}