Cache thumbnails to disk

Cargo.toml

@@ -8,6 +8,9 @@ anyhow = "1.0.102"
 base64 = "0.22.1"
 blurhash = "0.2.3"
 clap = { version = "4.6.0", features = ["derive", "env"] }
+either = "1.15.0"
+futures = "0.3.32"
+image = { version = "0.25.10", default-features = false, features = ["serde", "webp"] }
 immich-sdk.path = "../immich-sdk/"
 kameo = "0.19.2"
 serde = { version = "1.0.228", features = ["derive"] }
@@ -16,6 +19,7 @@ thumbhash = "0.1.0"
 tokio = { version = "1.51.0", features = ["full"] }
 tracing = "0.1.44"
 tracing-subscriber = { version = "0.3.23", features = ["env-filter"] }
+xdg = "3.0.0"
 
 [dependencies.slint]
 version = "1.16.1"