JS: Improve and fix subghz module

- Fix some memory leaks
- Check for setup() being called
- Add end(), can setup() again to check for external module
- Add support for custom modulation presets
- Improve error handling
- Deinit correctly at exit
- Fix RAW files
- Fix repeat behavior, can specify with transmitFile(path, repeat)

applications/system/js_app/examples/apps/Scripts/Examples/subghz.js

@@ -29,9 +29,17 @@ changeFrequency(433920000);
 printRXline();
 delay(1000);
 
-let result = subghz.transmitFile("/ext/subghz/0.sub");
-print(result ? "Send success" : "Send failed");
+print("Sending 0.sub")
+subghz.transmitFile("/ext/subghz/0.sub");
+// Can also specify repeat count: subghz.transmitFile(path, repeat)
+// If not provided, defaults to 1 repeat for RAW and 10 repeats for parsed
+// These 10 repeats by default are to simulate holding the button on remote
+print("Send success");
 delay(1000);
 
 changeFrequency(315000000);
-printRXline();
+printRXline();
+
+// Optional, done automatically at script end
+subghz.end()
+// But can be used to setup again, which will retry to detect external modules