cli: implement the rad remote add command

implementing the `rad remote add` command in order
to be able to add rad remotes from the command
line.

Signed-off-by: Vincenzo Palazzo <vincenzopalazzodev@gmail.com>

radicle-cli/src/commands/remote/add.rs

@@ -0,0 +1,38 @@
+use radicle::node::tracking::store::Config;
+use radicle::{git::Url, node::TRACKING_DB_FILE, prelude::Id, Profile};
+use radicle_crypto::PublicKey;
+
+use crate::git::add_remote;
+use crate::{git, terminal as term};
+
+pub fn run(
+    repository: &git::Repository,
+    profile: &Profile,
+    pubkey: &PublicKey,
+    name: Option<String>,
+    id: Id,
+) -> anyhow::Result<()> {
+    let name = match name {
+        Some(name) => name,
+        _ => get_remote_name(profile, pubkey)?
+            .ok_or(anyhow::anyhow!("a `name` needs to be specified"))?,
+    };
+    if git::is_remote(repository, &name)? {
+        anyhow::bail!("remote `{name}` already exists");
+    }
+
+    let url = Url::from(id).with_namespace(*pubkey);
+    let remote = add_remote(repository, &name, &url)?;
+    term::success!(
+        "Remote {} added with {url}",
+        remote.name,
+    );
+    Ok(())
+}
+
+/// Get the `git remote` name from the command `Options` and `pubkey`.
+fn get_remote_name(profile: &Profile, pubkey: &PublicKey) -> anyhow::Result<Option<String>> {
+    let path = profile.home.node().join(TRACKING_DB_FILE);
+    let storage = Config::reader(path)?;
+    Ok(storage.node_policy(pubkey)?.and_then(|node| node.alias))
+}