feat: add a filterable count_rows to all the lancedb APIs (#913)

A `count_rows` method that takes a filter was recently added to
`LanceTable`. This PR adds it everywhere else except `RemoteTable` (that
will come soon).

nodejs/vectordb/native.d.ts

@@ -73,7 +73,7 @@ export class Table {
   /** Return Schema as empty Arrow IPC file. */
   schema(): Buffer
   add(buf: Buffer): Promise<void>
-  countRows(): Promise<bigint>
+  countRows(filter?: string): Promise<bigint>
   delete(predicate: string): Promise<void>
   createIndex(): IndexBuilder
   query(): Query

nodejs/vectordb/table.ts

@@ -50,8 +50,8 @@ export class Table {
   }
 
   /** Count the total number of rows in the dataset. */
-  async countRows(): Promise<bigint> {
-    return await this.inner.countRows();
+  async countRows(filter?: string): Promise<bigint> {
+    return await this.inner.countRows(filter);
   }
 
   /** Delete the rows that satisfy the predicate. */