feat: support for cargo binstall

this lets users install the binary directly instead of compiling it
themselves or grabbing the releases manually

Cargo.toml

@@ -1,7 +1,8 @@
 [package]
 name = "markdown-oxide"
-version = "0.1.0"
+version = "0.0.21"
 edition = "2021"
+repository = "https://github.com/Feel-ix-343/markdown-oxide"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
@@ -25,3 +26,7 @@ shellexpand = "3.1.0"
 tokio = { version = "1.34.0", features = ["full"] }
 tower-lsp = { git = "https://github.com/Feel-ix-343/tower-lsp" }
 walkdir = "2.4.0"
+
+[package.metadata.binstall]
+pkg-url = "{ repo }/releases/download/v{ version }/{ name }-v{ version }-{ target }{ archive-suffix }"
+pkg-fmt = "tgz"