Filesystem improvements and more (#148)

- Rename `assets` and `config` partitions to `system` and `data`
- Change partition type from `spiffs` to `fat`, so we can have sub-directories
- Fix crash when doing WiFi scan: Increased system event task size to 3kB. 
- Free up IRAM on ESP32 (it was required for the Core2, but I also freed up the same amount for Yellow Board)
- Introduced `Paths` objects that can be retrieved by `AppContext` and `ServiceContext`. Apps and services now have their own relative paths. Assets were re-arranged into the correct paths.
- Rename simulator window title to "Tactility"
- Refactored statusbar widget so it persists icon paths properly (it kept a const char* reference, but didn't copy it, so it crashed when the related std::string was destroyed)
- Created `Partitions.h` to expose some useful variables
- Moved USB config in various `sdkconfig`  (it was part of the "default" section, but it shouldn't be)
- Updated domain name

TactilityCore/Source/Log.cpp

@@ -118,7 +118,7 @@ static uint64_t getTimestamp() {
 
 void log(LogLevel level, const char* tag, const char* format, ...) {
     std::stringstream buffer;
-    buffer << toColour(level) << toPrefix(level) << " (" << getTimestamp() << ") " << tag << " " << format << "\033[0m\n";
+    buffer << toColour(level) << toPrefix(level) << " (" << getTimestamp() << ") " << tag << ": " << format << "\033[0m\n";
 
     va_list args;
     va_start(args, format);