Full support for Athom WLED Music Controller

- athom_music_esp32_4MB_M bin
- show flashsize in info tab and /getflash
- support of their ir-remote (24-key music)

Not supported yet
- mac addres in AP name (need to experiment with WLED_AP_SSID_UNIQUE)

wled00/data/index.js

@@ -644,6 +644,8 @@ function populateInfo(i)
 	var heap = i.freeheap/1000;
 	var heap = Math.round(i.freeheap/100)/10;        // WLEDMM bugfix
 	var theap = (i.totalheap>0)?i.totalheap/1000:-1; //WLEDMM - total heap is not available on 8266
+	var flashsize = i.getflash/1000; //WLEDMM and Athom
+	flashsize = flashsize.toFixed(1); //WLEDMM and Athom
 	var pwr = i.leds.pwr;
 	var pwru = "Not calculated";
 	if (pwr > 1000) {pwr /= 1000; pwr = pwr.toFixed((pwr > 10) ? 0 : 1); pwru = pwr + " A";}
@@ -680,6 +682,7 @@ ${inforow("Filesystem",i.fs.u + "/" + i.fs.t + " kB (" +Math.round(i.fs.u*100/i.
 ${theap>0?inforow("Heap ☾",((i.totalheap-i.freeheap)/1000).toFixed(0)+"/"+theap.toFixed(0)+" kB"," ("+Math.round((i.totalheap-i.freeheap)/(10*theap))+"%)"):""}
 ${i.minfreeheap?inforow("Max used heap ☾",((i.totalheap-i.minfreeheap)/1000).toFixed(1)+" kB"," ("+Math.round((i.totalheap-i.minfreeheap)/(10*theap))+"%)"):""}
 ${inforow("Free heap",heap," kB")}
+${inforow("Flash Size ☾",flashsize," kB")}  <!--WLEDMM and Athom-->
 ${i.tpram?inforow("PSRAM ☾",(i.tpram/1024).toFixed(1)," kB"):""}
 ${i.psram?((i.tpram-i.psram)>16383?inforow("Used PSRAM ☾",((i.tpram-i.psram)/1024).toFixed(1)," kB"):inforow("Used PSRAM ☾",(i.tpram-i.psram)," B")):""}
 ${i.psusedram?((i.tpram-i.psusedram)>16383?inforow("Max used PSRAM ☾",((i.tpram-i.psusedram)/1024).toFixed(1)," kB"):inforow("Max used PSRAM ☾",(i.tpram-i.psusedram)," B")):""}