feat: add the optimize function to nodejs and async python (#1257)

The optimize function is pretty crucial for getting good performance
when building a large scale dataset but it was only exposed in rust
(many sync python users are probably doing this via to_lance today)

This PR adds the optimize function to nodejs and to python.

I left the function marked experimental because I think there will
likely be changes to optimization (e.g. if we add features like
"optimize on write"). I also only exposed the `cleanup_older_than`
configuration parameter since this one is very commonly used and the
rest have sensible defaults and we don't really know why we would
recommend different values for these defaults anyways.

python/python/tests/test_table.py

@@ -1025,3 +1025,29 @@ async def test_time_travel(db_async: AsyncConnection):
     # Can't use restore if not checked out
     with pytest.raises(ValueError, match="checkout before running restore"):
         await table.restore()
+
+
+@pytest.mark.asyncio
+async def test_optimize(db_async: AsyncConnection):
+    table = await db_async.create_table(
+        "test",
+        data=[{"x": [1]}],
+    )
+    await table.add(
+        data=[
+            {"x": [2]},
+        ],
+    )
+    stats = await table.optimize()
+    assert stats.compaction.files_removed == 2
+    assert stats.compaction.files_added == 1
+    assert stats.compaction.fragments_added == 1
+    assert stats.compaction.fragments_removed == 2
+    assert stats.prune.bytes_removed == 0
+    assert stats.prune.old_versions_removed == 0
+
+    stats = await table.optimize(cleanup_older_than=timedelta(seconds=0))
+    assert stats.prune.bytes_removed > 0
+    assert stats.prune.old_versions_removed == 3
+
+    assert await table.query().to_arrow() == pa.table({"x": [[1], [2]]})