refactor(client-cli): rework snapshot-converter prints

So it conforms ADR#7 - Standardize log output:
- print every progress message in stderr
- add support for json output

Note: as the command run a subcommand, the subcommands print are only
shown when json output is disabled, if we want otherwise we need to
intercept messages to format them in a json object (which is not
trivial).

Author: Alenar

mithril-client-cli/src/commands/tools/utxo_hd/mod.rs

@@ -20,15 +20,15 @@ pub enum UTxOHDCommands {
 
 impl UTxOHDCommands {
     /// Execute UTxO-HD command
-    pub async fn execute(&self, _context: CommandContext) -> MithrilResult<()> {
+    pub async fn execute(&self, context: CommandContext) -> MithrilResult<()> {
         match self {
             Self::SnapshotConverter(cmd) => {
                 if cfg!(target_os = "linux") && cfg!(target_arch = "aarch64") {
                     return Err(anyhow!(
                         "'snapshot-converter' command is not supported on Linux ARM"
                     ));
                 }
-                cmd.execute().await
+                cmd.execute(context).await
             }
         }
     }