feat(l2): Arduino-ESP32 3.3.12 / IDF 5.5 env, NimBLE and new I2S driver ports, large UI buffers in PSRAM

- New env Wio_Tracker_L2_companion_solo_lvgl_v3 on pioarduino 55.03.312-1;
  the 2.0.17 env stays until the new one passes the hardware checklist
- SerialBLEInterface: NimBLE variant (PIN pairing through encrypted,
  authenticated characteristic properties; setAccessPermissions is a no-op)
- buzzer: i2s_std driver on IDF 5 (legacy driver kept for 2.0.17)
- ESPNOWRadio: IDF 5 callback signatures
- ui-lvgl: psramBuf() for trail drawing, tile cache, map marks, list rows,
  keyboard maps and message metadata; internal heap back to 2.0.17 level

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

examples/companion_radio/ui-lvgl/DeviceScreen.h

@@ -21,7 +21,8 @@ static lv_obj_t* s_lock_unread = nullptr;
 static lv_obj_t* s_lock_slider = nullptr;
 
 static int s_fav_slot = -1;               // slot the hold / pick popup is about
-static uint8_t s_pick_keys[64][PUB_KEY_SIZE];
+static const int PICK_MAX = 64;
+static uint8_t (*s_pick_keys)[PUB_KEY_SIZE] = psramBuf<uint8_t[PUB_KEY_SIZE]>(PICK_MAX);
 enum : int { PICK_CONTACT = 100 };        // pick codes: channel index, or PICK_CONTACT + row
 
 // "Pin" from an options popup: what gets pinned.
@@ -313,7 +314,7 @@ void UITask::favPickPopup(int slot) {
   }
   sectionTitle(list, "CONTACTS AND ROOMS");
   int rows = 0, total = the_mesh.getNumContacts();
-  const int MAX_ROWS = (int)(sizeof(s_pick_keys) / sizeof(s_pick_keys[0]));
+  const int MAX_ROWS = PICK_MAX;
   for (int pass = 0; pass < 2; pass++) {
     for (int i = 0; i < total && rows < MAX_ROWS; i++) {
       ContactInfo c;