Fix: return failure when PhoneAPI times out (#3136)

* Add debug options for RP2040

* Rename: "observed" should be plural: "observables"

* PhoneAPI: return failure on timeout
In `onNotify()`, when disconnected, PhoneAPI removed itself from the list of observers that was looped through in `notifyObservers()`. We should exit that loop in that case.

variants/rak11310/platformio.ini

@@ -10,4 +10,6 @@ build_flags = ${rp2040_base.build_flags}
   -DDEBUG_RP2040_PORT=Serial
   -L "${platformio.libdeps_dir}/${this.__env__}/BSEC2 Software Library/src/cortex-m0plus"
 lib_deps =
-  ${rp2040_base.lib_deps}
+  ${rp2040_base.lib_deps}
+debug_build_flags = ${rp2040_base.build_flags}
+debug_tool = cmsis-dap ; for e.g. Picotool

variants/rpipico/platformio.ini

@@ -11,4 +11,6 @@ build_flags = ${rp2040_base.build_flags}
   -DHW_SPI1_DEVICE
   -L "${platformio.libdeps_dir}/${this.__env__}/BSEC2 Software Library/src/cortex-m0plus"
 lib_deps =
-  ${rp2040_base.lib_deps}
+  ${rp2040_base.lib_deps}
+debug_build_flags = ${rp2040_base.build_flags}
+debug_tool = cmsis-dap ; for e.g. Picotool

variants/rpipicow/platformio.ini

@@ -14,4 +14,6 @@ build_flags = ${rp2040_base.build_flags}
 build_src_filter = ${rp2040_base.build_src_filter} +<mesh/wifi/>
 lib_deps =
   ${rp2040_base.lib_deps}
-  ${networking_base.lib_deps}
+  ${networking_base.lib_deps}
+debug_build_flags = ${rp2040_base.build_flags}
+debug_tool = cmsis-dap ; for e.g. Picotool