Using `sql_tokenize()` table function for tokenization.

### What happens?

Original issue here: https://github.com/duckdblabs/duckdb-internal/issues/6733

https://github.com/duckdb/duckdb/pull/20171 introduced a new table function `sql_tokenize`, which takes as input the query and returns the tokens and their category.
Currently in the python client we use a custom implementation somewhere near `PyTokenize` (see [here](https://github.com/duckdb/duckdb-python/blob/89ed9a1d66dcab2455cfd667462f1b90619b2aac/src/duckdb_py/duckdb_python.cpp#L35)). I think this can now be moved over to use the table function instead, making it a bit simpler, and possible to provide more information about tokenization in the future.

### To Reproduce

See above

### OS:

MacOS

### DuckDB Package Version:

latest

### Python Version:

3.14?

### Full Name:

Daniel ten Wolde

### Affiliation:

DuckDB Labs

### What is the latest build you tested with? If possible, we recommend testing with the latest nightly build.

I have tested with a stable release

### Did you include all relevant data sets for reproducing the issue?

Yes

### Did you include all code required to reproduce the issue?

- [x] Yes, I have

### Did you include all relevant configuration to reproduce the issue?

- [x] Yes, I have

src/duckdb_py/duckdb_python.cpp の PyTokenize 付近から始め、Python クライアントが現在どのようにクエリをトークン化しているかを追跡します。その経路を、duckdb/duckdb#20171 で導入されたテーブル関数 sql_tokenize と比較します。完了とは、クライアントがテーブル関数を使用し、返されたトークンとカテゴリを保持することです。

索引モデルが issue の本文から書いたものです。