Share a card's image from the preview

A share button beside the preview's close button sends the face being
shown at Scryfall's large size: on desktop the image is decoded and put on
the clipboard (tauri-plugin-clipboard-manager); on Android it's saved to
the cache and handed to the system share sheet by a small in-repo plugin
(SharePlugin.kt) through the app's FileProvider. The preview's corner
buttons are also a little larger.

src-tauri/Cargo.toml

@@ -25,6 +25,11 @@ mtgc-core = { path = "../crates/mtgc-core" }
 tauri-plugin-opener = "2.5.4"
 url = "2"
 
+[target.'cfg(not(any(target_os = "android", target_os = "ios")))'.dependencies]
+# Copying a card image: the clipboard takes raw pixels, and Scryfall serves JPEGs.
+tauri-plugin-clipboard-manager = "2"
+image = { version = "0.25", default-features = false, features = ["jpeg"] }
+
 [target.'cfg(target_os = "android")'.dependencies]
 # Delivers sync sign-ins back to the app through the `mtgc://` scheme.
 tauri-plugin-deep-link = "2"