feat(): add/update missing v5 market endpoints. add api doc examples for each endpoint.

examples/apidoc/V5/Market/get-historical-volatility.js

@@ -0,0 +1,18 @@
+const { RestClientV5 } = require('bybit-api');
+
+const client = new RestClientV5({
+  testnet: true,
+});
+
+client
+  .getHistoricalVolatility({
+    category: 'option',
+    baseCoin: 'ETH',
+    period: 30,
+  })
+  .then((response) => {
+    console.log(response);
+  })
+  .catch((error) => {
+    console.error(error);
+  });