Create cli binary

Just has `add-feed` command so far.

src/bin/cli.rs

@@ -0,0 +1,66 @@
+use anyhow::Result;
+use argh::FromArgs;
+use dotenvy::dotenv;
+use tracing::info;
+use sqlx::postgres::PgPoolOptions;
+use std::env;
+
+use lib::models::feed::{CreateFeed, FeedType};
+use lib::commands::add_feed::add_feed;
+
+#[derive(FromArgs)]
+/// CLI for crawlect
+struct Args {
+    #[argh(subcommand)]
+    commands: Commands,
+}
+
+#[derive(FromArgs)]
+#[argh(subcommand)]
+enum Commands {
+    AddFeed(AddFeed),
+}
+
+#[derive(FromArgs)]
+/// Add a feed to the database
+#[argh(subcommand, name = "add-feed")]
+struct AddFeed {
+    #[argh(option)]
+    /// title of the feed (max 255 characters)
+    title: String,
+    #[argh(option)]
+    /// URL of the feed (max 2048 characters)
+    url: String,
+    #[argh(option, long = "type")]
+    /// type of the feed ('rss' or 'atom')
+    feed_type: FeedType,
+    #[argh(option)]
+    /// description of the feed
+    description: Option<String>,
+}
+
+
+#[tokio::main]
+pub async fn main() -> Result<()> {
+    dotenv().ok();
+
+    tracing_subscriber::fmt::init();
+
+    let pool = PgPoolOptions::new()
+        .max_connections(env::var("DATABASE_MAX_CONNECTIONS")?.parse()?)
+        .connect(&env::var("DATABASE_URL")?)
+        .await?;
+
+    let args: Args = argh::from_env();
+
+    if let Commands::AddFeed(add_feed_args) = args.commands {
+        add_feed(pool, CreateFeed {
+            title: add_feed_args.title,
+            url: add_feed_args.url,
+            feed_type: add_feed_args.feed_type,
+            description: add_feed_args.description,
+        }).await?;
+    }
+
+    Ok(())
+}