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/domain/entities/track.rs

@@ -0,0 +1,47 @@
+use serde::{Deserialize, Serialize};
+use crate::domain::entities::{AudioTrack, SubtitleTrack};
+use crate::domain::value_objects::{SyncOffset, TrackId, TrackLanguage};
+
+/// Faixa externa adicionada pelo usuário ao projeto.
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub enum Track {
+    Audio(AudioTrack),
+    Subtitle(SubtitleTrack),
+}
+
+impl Track {
+    pub fn id(&self) -> TrackId {
+        match self {
+            Track::Audio(t) => t.id,
+            Track::Subtitle(t) => t.id,
+        }
+    }
+
+    pub fn offset(&self) -> SyncOffset {
+        match self {
+            Track::Audio(t) => t.offset,
+            Track::Subtitle(t) => t.offset,
+        }
+    }
+
+    pub fn language(&self) -> &TrackLanguage {
+        match self {
+            Track::Audio(t) => &t.language,
+            Track::Subtitle(t) => &t.language,
+        }
+    }
+
+    pub fn set_offset(&mut self, offset: SyncOffset) {
+        match self {
+            Track::Audio(t) => t.offset = offset,
+            Track::Subtitle(t) => t.offset = offset,
+        }
+    }
+
+    pub fn set_language(&mut self, language: TrackLanguage) {
+        match self {
+            Track::Audio(t) => t.language = language,
+            Track::Subtitle(t) => t.language = language,
+        }
+    }
+}