treewide: rewrite with Iced; migrate to new repository format

Signed-off-by: NotAShelf <raf@notashelf.dev>
Change-Id: If2c377d3b866a33a65d85836bc9010756a6a6964

crates/lychee-cli/src/lib.rs

@@ -0,0 +1,16 @@
+use clap::Parser;
+
+pub use clap::Parser as Clap;
+
+#[derive(Parser, Debug)]
+#[command(name = "lychee")]
+pub struct Args {
+    #[arg(help = "Paths to images or directories")]
+    pub paths: Vec<String>,
+
+    #[arg(short, long, help = "Open in fullscreen mode")]
+    pub fullscreen: bool,
+
+    #[arg(long, default_value_t = 5, help = "Slideshow interval in seconds")]
+    pub slideshow: u64,
+}