Add Deno support

Author: rojvv

mod.ts

@@ -0,0 +1,61 @@
+const path = "chdb_bun.so";
+
+const { symbols: chdb } = Deno.dlopen(path, {
+  Query: {
+    parameters: ["buffer", "buffer"],
+    result: "buffer",
+  },
+  QuerySession: {
+    parameters: ["buffer", "buffer", "buffer"],
+    result: "buffer",
+  },
+});
+
+const enc = new TextEncoder();
+// Standalone exported query function
+export function query(query: string, format: string = "CSV") {
+  if (!query) {
+    return "";
+  }
+  const result = chdb.Query(
+    enc.encode(query + "\0"),
+    enc.encode(format + "\0"),
+  );
+  if (result == null) {
+    return "";
+  }
+  return new Deno.UnsafePointerView(result).getCString();
+}
+
+// Session class with path handling
+class Session {
+  path: string;
+  isTemp: boolean;
+
+  query(query: string, format: string = "CSV") {
+    if (!query) return "";
+    return chdb.QuerySession(
+      enc.encode(query + "\0"),
+      enc.encode(format + "\0"),
+      enc.encode(this.path + "\0"),
+    );
+  }
+
+  constructor(path: string = "") {
+    if (path === "") {
+      // Create a temporary directory
+      this.path = Deno.makeTempDirSync();
+      this.isTemp = true;
+    } else {
+      this.path = path;
+      this.isTemp = false;
+    }
+  }
+
+  // Cleanup method to delete the temporary directory
+  cleanup() {
+    Deno.removeSync(this.path, { recursive: true });
+  }
+}
+
+export { chdb, Session };