Update Compose to 1.7.0-beta02 (#595)

This version of Compose deprecates the resource loading APIs we've been
using, and brutally removes ResourceLoader, so we need to migrate to the
new (experimental) CMP Resources API.

Things seem to work fine after upgrading and migrating. Would appreciate
further testing on platforms other than macOS before merging.

gradle/libs.versions.toml

@@ -3,8 +3,8 @@ commonmark = "0.22.0"
 composeDesktop = "1.7.0-rc01"
 detekt = "1.23.6"
 dokka = "1.9.20"
-idea = "2024.2.3"
-intelliJPlatformBuild = "242.23339.11"
+idea = "243.12818.47"
+intelliJPlatformBuild = "243.12818.47-EAP-SNAPSHOT"
 ideaPlugin = "2.1.0"
 jna = "5.14.0"
 kotlin = "2.0.10"