implement Titan protocol features

src/client/connection/request/gemini.rs

@@ -0,0 +1,22 @@
+use glib::{Bytes, Uri};
+
+/// [Gemini](https://geminiprotocol.net/docs/protocol-specification.gmi) protocol enum object for `Request`
+pub struct Gemini {
+    pub uri: Uri,
+}
+
+impl Gemini {
+    // Constructors
+
+    /// Build valid new `Self`
+    pub fn build(uri: Uri) -> Self {
+        Self { uri } // @TODO validate
+    }
+
+    // Getters
+
+    /// Copy `Self` to [Bytes](https://docs.gtk.org/glib/struct.Bytes.html)
+    pub fn to_bytes(&self) -> Bytes {
+        Bytes::from(format!("{}\r\n", self.uri).as_bytes())
+    }
+}