Introduce initial implementation of the vmic CLI with PipeWire integration

- Added `Cargo.toml` to define dependencies and project metadata.
- Implemented core CLI functionality for managing virtual microphones (`create`, `edit`, `delete`, `list`, `route`, and `wipe` commands) using `clap`.
- Integrated `rusqlite` for persistent state storage and `pipewire` to manage PipeWire nodes.
- Ensured graceful handling of feedback loops and system defaults during virtual mic creation and deletion.
- Added error handling via `thiserror` for cleaner error definitions.

src/ui.rs

@@ -0,0 +1,59 @@
+//! Colorized status output (NO_COLOR-aware).
+
+use std::io::IsTerminal;
+use std::sync::OnceLock;
+
+/// Honors NO_COLOR (<https://no-color.org>), dumb terminals, and redirected output.
+fn color_enabled() -> bool {
+    static ENABLED: OnceLock<bool> = OnceLock::new();
+    *ENABLED.get_or_init(|| {
+        std::env::var_os("NO_COLOR").is_none()
+            && std::env::var("TERM").map(|t| t != "dumb").unwrap_or(true)
+            && std::io::stdout().is_terminal()
+            && std::io::stderr().is_terminal()
+    })
+}
+
+fn paint(code: &str, s: &str) -> String {
+    if color_enabled() {
+        format!("\x1b[{code}m{s}\x1b[0m")
+    } else {
+        s.to_string()
+    }
+}
+
+pub fn red(s: &str) -> String {
+    paint("31", s)
+}
+
+pub fn yellow(s: &str) -> String {
+    paint("33", s)
+}
+
+pub fn green(s: &str) -> String {
+    paint("32", s)
+}
+
+pub fn blue(s: &str) -> String {
+    paint("34", s)
+}
+
+pub fn cyan(s: &str) -> String {
+    paint("36", s)
+}
+
+pub fn err(msg: &str) {
+    eprintln!("{}", red(&format!("Error: {msg}")));
+}
+
+pub fn warn(msg: &str) {
+    eprintln!("{}", yellow(&format!("Warning: {msg}")));
+}
+
+pub fn info(msg: &str) {
+    println!("{}", blue(msg));
+}
+
+pub fn ok(msg: &str) {
+    println!("{}", green(msg));
+}