tsk-50: Create functionality to extract song properties (#52)

Closes #50

Reviewed-on: phoenix/icarus_meta#52
Co-authored-by: phoenix <kundeng00@pm.me>
Co-committed-by: phoenix <kundeng00@pm.me>

src/properties/audio.rs

@@ -0,0 +1,14 @@
+use lofty::file::AudioFile;
+
+pub fn get_properties(songpath: &str) -> Result<lofty::flac::FlacProperties, std::io::Error> {
+    match std::fs::File::open(songpath) {
+        Ok(mut content) => {
+            match lofty::flac::FlacFile::read_from(&mut content, lofty::config::ParseOptions::new())
+            {
+                Ok(flac_file) => Ok(*flac_file.properties()),
+                Err(err) => Err(std::io::Error::other(err.to_string())),
+            }
+        }
+        Err(err) => Err(err),
+    }
+}