feat(firmware): Use pio_env to select correct firmware variant (#4244)

Signed-off-by: James Rich <2199651+jamesarich@users.noreply.github.com>

core/model/src/main/kotlin/org/meshtastic/core/model/MyNodeInfo.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2025 Meshtastic LLC
+ * Copyright (c) 2025-2026 Meshtastic LLC
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -14,7 +14,6 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
-
 package org.meshtastic.core.model
 
 import android.os.Parcelable
@@ -37,6 +36,7 @@ data class MyNodeInfo(
     val channelUtilization: Float,
     val airUtilTx: Float,
     val deviceId: String?,
+    val pioEnv: String? = null,
 ) : Parcelable {
     /** A human readable description of the software/hardware version */
     val firmwareString: String