Missing necessary index type `VECTOR` in CreateTableIndexRequest#IndexTypeEnum

[yuqi1129]

When we try to use CreateTableIndexRequest to build the Lance REST server, we found that IndexTypeEnum(https://github.com/lancedb/lance-namespace/blob/b035daec6b7cce0bec484c18326100d07c9e33bb/java/lance-namespace-apache-client/src/main/java/com/lancedb/lance/namespace/model/CreateTableIndexRequest.java#L55-L68) in CreateTableIndexRequest lacks many types have supported in Lance(see: https://github.com/lancedb/lance/blob/d8f9dcbea5808e0ad98ca5e662c8c8e5f93c790b/java/src/main/java/com/lancedb/lance/index/IndexType.java#L15C1-L33)

for example, there is no FST in Lance, however, CreateTableIndexRequest#IndexTypeEnum did have it. No vector was found in CreateTableIndexRequest#IndexTypeEnum.

The same goes for ZONEMAP.

So, why are the types inconsistent here? How can we create a VECTOR index via CreateTableIndexRequest?