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/application/use_cases/set_track_language.rs

@@ -0,0 +1,44 @@
+use anyhow::{anyhow, Result};
+use crate::domain::entities::Project;
+use crate::domain::value_objects::{TrackId, TrackLanguage};
+
+/// Altera o idioma de uma faixa externa pelo TrackId.
+pub struct SetTrackLanguage;
+
+impl SetTrackLanguage {
+    pub fn execute(project: &mut Project, id: TrackId, language: TrackLanguage) -> Result<()> {
+        let track = project
+            .find_track_mut(id)
+            .ok_or_else(|| anyhow!("Faixa não encontrada: {:?}", id))?;
+        track.set_language(language);
+        Ok(())
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::application::use_cases::add_audio_track::AddAudioTrack;
+    use crate::domain::entities::{MkvOutput, Project, VideoFile};
+    use crate::domain::value_objects::{FilePath, SyncOffset};
+
+    #[test]
+    fn altera_idioma_da_faixa() {
+        let mut project = Project::new(
+            VideoFile::new(FilePath::from("input.mkv")),
+            MkvOutput::new(FilePath::from("output.mkv")),
+        )
+        .unwrap();
+        AddAudioTrack::execute(
+            &mut project,
+            FilePath::from("audio.aac"),
+            SyncOffset::default(),
+            TrackLanguage::new("por").unwrap(),
+        )
+        .unwrap();
+        let id = project.tracks[0].id();
+
+        SetTrackLanguage::execute(&mut project, id, TrackLanguage::new("eng").unwrap()).unwrap();
+        assert_eq!(project.tracks[0].language().as_str(), "eng");
+    }
+}