jrnl: add basic cli

programs/jrnl/src/main.rs

@@ -1,3 +1,22 @@
-fn main() {
-    println!("Hello, world!");
+use clap::{Parser, Subcommand};
+use std::path::PathBuf;
+
+#[derive(Debug, Parser)]
+struct Cli {
+    #[arg(env)]
+    s10e_jrnl_file_loc: PathBuf,
+    #[command(subcommand)]
+    command: Option<Command>,
+}
+
+#[derive(Debug, Subcommand)]
+enum Command {
+    List,
+    Add,
+}
+
+fn main() {
+    let cli = Cli::parse();
+    println!("Hello, world!");
+    println!("cli: {cli:#?}")
 }