Add Go and Java support for check_pattern

[protonese3]

Description

The code pattern scanner currently supports JavaScript, TypeScript, Python, and SQL. Add regex matchers for Go and Java vulnerabilities.

Go patterns to add

• SQL injection: fmt.Sprintf("SELECT...%s", userInput)
• Command injection: exec.Command("sh", "-c", userInput)
• Path traversal: filepath.Join(dir, userInput) without sanitization
• SSRF: http.Get(userURL) without validation

Java patterns to add

• SQL injection: statement.executeQuery("SELECT..." + input)
• Deserialization: ObjectInputStream with untrusted data
• XXE: DocumentBuilderFactory without disabling external entities
• Path traversal: new File(basePath + userInput)

Files to edit

• src/tools/knowledge/check_pattern.rs