Add support for sending view once messages

Closes #1812

client/src/cli.rs

@@ -179,6 +179,9 @@ pub enum CliCommands {
         #[arg(short = 'a', long)]
         attachment: Vec<String>,
 
+        #[arg(long)]
+        view_once: bool,
+
         #[arg(long)]
         mention: Vec<String>,
 

client/src/jsonrpc.rs

@@ -183,6 +183,7 @@ pub trait Rpc {
         endSession: bool,
         message: String,
         attachments: Vec<String>,
+        view_once: bool,
         mentions: Vec<String>,
         textStyle: Vec<String>,
         quoteTimestamp: Option<u64>,

client/src/main.rs

@@ -144,6 +144,7 @@ async fn handle_command(
             end_session,
             message,
             attachment,
+            view_once,
             mention,
             text_style,
             quote_timestamp,
@@ -170,6 +171,7 @@ async fn handle_command(
                     end_session,
                     message.unwrap_or_default(),
                     attachment,
+                    view_once,
                     mention,
                     text_style,
                     quote_timestamp,