cleanup main.cpp, split platform code into a Platform object

src/Platform.h

@@ -0,0 +1,31 @@
+#pragma once
+#include <FastLED.h>
+#include "BootOptions.h"
+
+class Platform {
+    static int s_timezone;
+    static char s_deviceID[15];
+  public:
+    static BootOptions bootopts;
+    static void setTimezone(int tz) { s_timezone = tz; }
+    static int getTimezone() { return s_timezone; }
+
+    static void addLEDs(CRGB* leds, unsigned int ledCount) {
+#ifdef PLATFORM_PHOTON
+      FastLED.addLeds<NEOPIXEL, 6>(leds, ledCount);
+#elif defined(BOARD_ESP32)
+      FastLED.addLeds<WS2812B, 13, RGB>(leds, ledCount);
+#else
+      FastLED.addLeds<WS2812B, 14, GRB>(leds, ledCount);
+#endif
+    }
+
+    static const char* name();
+    static const char* version();
+    static void preSetup();
+    static void bootSplash();
+    static void setup();
+    static void loop();
+    static bool getLocalTime(struct tm* timedata);
+    static const char* deviceID();
+};