feat: add czv, czv-wasm, and czv-python (init release)

czv-python/src/lib.rs

@@ -0,0 +1,43 @@
+use pyo3::prelude::*;
+
+// Error-handling helpers
+#[derive(thiserror::Error, Debug)]
+#[error("{0}")]
+pub struct CzvError(anyhow::Error);
+
+impl From<pyo3::PyErr> for CzvError {
+    fn from(value: pyo3::PyErr) -> Self {
+        value.into()
+    }
+}
+
+impl From<csv::Error> for CzvError {
+    fn from(value: csv::Error) -> Self {
+        value.into()
+    }
+}
+
+impl From<CzvError> for pyo3::PyErr {
+    fn from(value: CzvError) -> Self {
+        value.into()
+    }
+}
+
+pub type Result<T> = anyhow::Result<T, CzvError>;
+
+#[allow(unused_macros)]
+macro_rules! bail {
+    ($err:expr $(,)?) => {
+        return Err(crate::CzvError(anyhow::anyhow!($err)))
+    };
+}
+
+// Command imports
+pub mod count;
+
+#[pymodule]
+fn czv(m: &Bound<'_, PyModule>) -> PyResult<()> {
+    m.add_function(wrap_pyfunction!(count::row_count, m)?)?;
+    m.add_function(wrap_pyfunction!(count::column_count, m)?)?;
+    Ok(())
+}