feat: implement project management and media track handling

- Added domain entities for audio, subtitle, and video tracks.
- Created a Project entity to manage media editing sessions.
- Implemented value objects for file paths, sync offsets, track IDs, and languages.
- Developed infrastructure for asynchronous FFmpeg process execution.
- Built a user interface for selecting video files, adding audio and subtitle tracks, and managing output settings.
- Integrated error handling and logging for media processing tasks.

src/infrastructure/process/mod.rs

@@ -0,0 +1,59 @@
+use anyhow::{anyhow, Context, Result};
+use tokio::io::{AsyncBufReadExt, BufReader};
+use tokio::process::Command;
+use tokio::sync::mpsc;
+
+/// Executa o FFmpeg de forma assíncrona, capturando stderr em tempo real.
+/// As linhas de saída são enviadas pelo canal `progress_tx`.
+pub async fn run_ffmpeg_async(
+    args: Vec<String>,
+    progress_tx: mpsc::UnboundedSender<String>,
+) -> Result<()> {
+    let mut child = Command::new("ffmpeg")
+        .args(&args)
+        .stderr(std::process::Stdio::piped())
+        .stdout(std::process::Stdio::null())
+        .spawn()
+        .context("Falha ao iniciar ffmpeg")?;
+
+    // Lê stderr em stream para exibir progresso em tempo real
+    if let Some(stderr) = child.stderr.take() {
+        let reader = BufReader::new(stderr);
+        let mut lines = reader.lines();
+        let tx = progress_tx.clone();
+        tokio::spawn(async move {
+            while let Ok(Some(line)) = lines.next_line().await {
+                let _ = tx.send(line);
+            }
+        });
+    }
+
+    let status = child.wait().await.context("Erro ao aguardar ffmpeg")?;
+
+    if !status.success() {
+        return Err(anyhow!(
+            "FFmpeg encerrou com código de saída: {:?}",
+            status.code()
+        ));
+    }
+
+    Ok(())
+}
+
+/// Verifica se um binário está disponível no PATH.
+pub fn check_binary_available(binary: &str) -> Result<()> {
+    std::process::Command::new(binary)
+        .arg("-version")
+        .stdout(std::process::Stdio::null())
+        .stderr(std::process::Stdio::null())
+        .status()
+        .map_err(|_| anyhow!("'{}' não encontrado no PATH. Por favor, instale o FFmpeg.", binary))?;
+    Ok(())
+}
+
+/// Verifica se ffmpeg e ffprobe estão disponíveis.
+pub fn validate_dependencies() -> Result<()> {
+    check_binary_available("ffmpeg")?;
+    check_binary_available("ffprobe")?;
+    Ok(())
+}