Add vendor assessment agent

Signed-off-by: Aurélien Sibiril <81782+aureliensibiril@users.noreply.github.com>

pkg/llm/message.go

@@ -52,3 +52,13 @@ func (m Message) Text() string {
 	}
 	return s.String()
 }
+
+func (m Message) Thinking() string {
+	var s strings.Builder
+	for _, p := range m.Parts {
+		if tp, ok := p.(ThinkingPart); ok {
+			s.WriteString(tp.Text)
+		}
+	}
+	return s.String()
+}