fix: correct RelativeStrengthAB binding wrapper casing (#296)

The WASM and Node binding wrappers were named with the lowercase-b acronym
(WasmRelativeStrengthAb, RelativeStrengthAbNode) while the core type and every
other surface use RelativeStrengthAB. The published JS/WASM class name was
already correct via js_name/js_class, so this only aligns the internal Rust
identifiers and the auto-generated TypeScript type alias
(RelativeStrengthAbNode -> RelativeStrengthABNode). Runtime API unchanged.

bindings/wasm/src/lib.rs

@@ -730,14 +730,14 @@ impl WasmCointegration {
 // ---------- RelativeStrengthAB (two params, object output) ----------
 
 #[wasm_bindgen(js_name = "RelativeStrengthAB")]
-pub struct WasmRelativeStrengthAb {
+pub struct WasmRelativeStrengthAB {
     inner: wc::RelativeStrengthAB,
 }
 
 #[wasm_bindgen(js_class = "RelativeStrengthAB")]
-impl WasmRelativeStrengthAb {
+impl WasmRelativeStrengthAB {
     #[wasm_bindgen(constructor)]
-    pub fn new(ma_period: usize, rsi_period: usize) -> Result<WasmRelativeStrengthAb, JsError> {
+    pub fn new(ma_period: usize, rsi_period: usize) -> Result<WasmRelativeStrengthAB, JsError> {
         Ok(Self {
             inner: wc::RelativeStrengthAB::new(ma_period, rsi_period).map_err(map_err)?,
         })