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

czv-wasm/src/lib.rs

@@ -0,0 +1,30 @@
+use wasm_bindgen::JsValue;
+
+// Error-handling helpers
+#[derive(thiserror::Error, Debug)]
+#[error("{0}")]
+pub struct CzvError(anyhow::Error);
+
+impl From<csv::Error> for CzvError {
+    fn from(value: csv::Error) -> Self {
+        value.into()
+    }
+}
+
+impl Into<JsValue> for CzvError {
+    fn into(self) -> JsValue {
+        JsValue::from_str(self.to_string().as_str())
+    }
+}
+
+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;