[fix](trx-core): enable CW decoder by default

Set cw_decode_enabled default to true so CW decoding can start
without an unavailable UI toggle.

Co-authored-by: Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>

src/trx-core/src/rig/state.rs

@@ -132,7 +132,7 @@ impl RigState {
             server_longitude: None,
             pskreporter_status: None,
             aprs_decode_enabled: false,
-            cw_decode_enabled: false,
+            cw_decode_enabled: true,
             ft8_decode_enabled: false,
             wspr_decode_enabled: false,
             cw_auto: true,