[Enhancement] Add shared element transitions to Compose screens

[EdricChan03]

Sub-tracking issue for #368 to add shared element transitions where applicable (e.g. tasks list screen -> task details screen)

Shared element transitions have officially landed in Compose Animation 1.7.x 🥳, so the information below is no longer applicable

Old notes

Now that shared element transitions have landed in the AndroidX repository (but is unfortunately yet to be released in an alpha), we can try experimenting with it. The linked twitter X thread shows that we can try it out by using a snapshot version, perhaps something like below:

settings.gradle.kts

repositories {
  maven(url = "https://androidx.dev/snapshots/builds/11677275/artifacts/repository")
}

gradle/libs.versions.toml

-androidx-compose-animation = { module = "androidx.compose.animation:animation", version.ref = "androidx-compose" }
+androidx-compose-animation = "androidx.compose.animation:animation:1.7.0-SNAPSHOT"

Because there's currently no alpha release with this change, the "blocked" tag is added for now

Tasks

• Run through demos for an example of the API usage (see androidx/androidx@c5f36c0)
• Add shared element transitions to tasks page (see also [Refactor] Migrate tasks feature to Jetpack Compose #582)