chore: refactor into a RecordingDataManager, lay the ground work for a RenderManager

src/recording_data/microsecond.rs

@@ -0,0 +1,21 @@
+use snafu::{OptionExt as _, ResultExt as _, Snafu};
+use std::num::ParseIntError;
+
+pub type Microsecond = u32;
+
+#[derive(Debug, Snafu)]
+pub enum TakeError {
+    /// microseconds are supposed to be followed by -
+    Malformed,
+
+    /// could not parse the microsecond as an integer
+    ParseIntegerError { source: ParseIntError },
+}
+
+pub fn take(path: &str) -> Result<(Microsecond, &str), TakeError> {
+    let (microsecond, rest) = path.split_once('-').context(MalformedSnafu)?;
+
+    let microsecond = microsecond.parse().context(ParseIntegerSnafu)?;
+
+    Ok((microsecond, rest))
+}