Align board project names with board ids (#399)

To avoid keeping track of a list that maps board project names to board ids.
Because of this change, we don't have to manually edit `boards.cmake` anymore when adding a new board.

Boards/simulator/Source/Simulator.h

@@ -0,0 +1,21 @@
+#pragma once
+
+#include "Main.h"
+
+namespace simulator {
+    /** Set the function pointer of the real app_main() */
+    void setMain(MainFunction mainFunction);
+    /** The actual main task */
+    void freertosMain();
+}
+
+extern "C" {
+void app_main(); // ESP-IDF's main function, implemented in the application
+}
+
+int main() {
+    // Actual main function that passes on app_main() (to be executed in a FreeRTOS task) and bootstraps FreeRTOS
+    simulator::setMain(app_main);
+    simulator::freertosMain();
+    return 0;
+}