refactor(desktop): update image loader cache version and SVG decoding

This commit updates the image loading configuration for the desktop application to improve asset handling and manage cache versioning.

Specific changes include:
- Updated the image disk cache directory path to `image_cache_v3`.
- Configured `SvgDecoder.Factory` with `renderToBitmap = false` to change how SVG assets are processed by the image loader.

Signed-off-by: James Rich <2199651+jamesarich@users.noreply.github.com>

desktop/src/main/kotlin/org/meshtastic/desktop/Main.kt

@@ -244,11 +244,11 @@ fun main(args: Array<String>) = application(exitProcessOnExit = false) {
             },
         ) {
             setSingletonImageLoaderFactory { context ->
-                val cacheDir = System.getProperty("user.home") + "/.meshtastic/image_cache"
+                val cacheDir = System.getProperty("user.home") + "/.meshtastic/image_cache_v3"
                 ImageLoader.Builder(context)
                     .components {
                         add(KtorNetworkFetcherFactory())
-                        add(SvgDecoder.Factory())
+                        add(SvgDecoder.Factory(renderToBitmap = false))
                     }
                     .memoryCache { MemoryCache.Builder().maxSizeBytes(MEMORY_CACHE_MAX_BYTES).build() }
                     .diskCache {