add url to source code

src/components/Prompt.vue

@@ -172,6 +172,7 @@ function timeRadioHelpCommand() {
 function helpCommand() {
     const helpResponse = `Cypher23 is a fictional story to raise awareness about privacy and information control` +
         `\n\nMade with ❤️ by yeray@brokenlab` +
+        `\nSource code available at https://gitea.brokenlab.xyz/yeray/cypher23` +
         `\n\nCommands:` +
         `\n\n- time-radio fut://cypher23@2668037535473: Play the space-time audio stream cypher23` +
         `\n- time-radio --help: Display help information about the time-radio command` +