Add README, plugin citations, and multi-platform release CI.

Ship screenshots and third-party notices for the desktop shell, and
package Windows, macOS, deb, rpm, and Flatpak from GitHub Releases.

Co-authored-by: Cursor <cursoragent@cursor.com>

src-tauri/Cargo.toml

@@ -0,0 +1,32 @@
+[package]
+name = "dsh-desktop"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+authors.workspace = true
+description = "Tauri desktop shell for DeepSeek Harness"
+
+[lib]
+name = "dsh_desktop_lib"
+crate-type = ["lib", "cdylib", "staticlib"]
+
+[[bin]]
+name = "dsh-desktop"
+path = "src/main.rs"
+
+[build-dependencies]
+tauri-build = { version = "2", features = [] }
+
+[dependencies]
+dsh-core = { path = "../crates/dsh-core" }
+tauri = { version = "2", features = ["devtools"] }
+tauri-plugin-opener = "2"
+tauri-plugin-single-instance = "2"
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+arboard = "3"
+image = { version = "0.25", default-features = false, features = ["png"] }
+open = "5"
+url = "2"
+log = "0.4"
+env_logger = "0.11"