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

Tactility/Source/app/files/FileUtils.cpp

@@ -36,6 +36,7 @@ int scandir(
     ScandirFilter _Nullable filterMethod,
     ScandirSort _Nullable sortMethod
 ) {
+    TT_LOG_I(TAG, "scandir start");
     DIR* dir = opendir(path.c_str());
     if (dir == nullptr) {
         TT_LOG_E(TAG, "Failed to open dir %s", path.c_str());
@@ -55,6 +56,7 @@ int scandir(
         sort(outList.begin(), outList.end(), sortMethod);
     }
 
+    TT_LOG_I(TAG, "scandir finish");
     return (int)outList.size();
 };