feat(configuration): Add global configuration

also update some error messages

src/configuration.rs

@@ -0,0 +1,46 @@
+use clap::Parser;
+use lazy_static::lazy_static;
+use std::env;
+use std::path::PathBuf;
+
+lazy_static! {
+    pub static ref CONFIG: Config = Config::new();
+}
+
+#[derive(Parser)]
+#[command(version, about, long_about = None)]
+struct Args {
+    #[arg(help = "Directory to scan for files")]
+    path: Option<PathBuf>,
+}
+
+#[derive(Debug)]
+pub struct Config {
+    pub base_path: PathBuf,
+}
+
+impl Default for Config {
+    fn default() -> Self {
+        Config {
+            base_path: env::current_dir().expect("Current directory is not available."),
+        }
+    }
+}
+
+impl Config {
+    pub fn new() -> Self {
+        let mut config = Self::default();
+
+        let cli = Self::get_cli_args();
+
+        if let Some(path) = cli.path {
+            config.base_path = path;
+        }
+
+        config
+    }
+
+    fn get_cli_args() -> Args {
+        Args::parse()
+    }
+}