Remove jessiql dependency and replace with SQLAlchemy 2.x

[bgunebakan]

Problem

• The pymongo optional extra depends on jessiql==1.0.0rc1, which is archived and no longer maintained.
• Requires sqlalchemy<2, blocking to support SQLAlchemy 2.x
• Blocks Python 3.13+ support

Current usage

jessiql is used exclusively in cratedb_toolkit/adapter/pymongo/reactor.py to translate MongoDB-style query parameters into SQLAlchemy ORM queries.

Proposed solution

• Replace jessiql with a hand-rolled SQLAlchemy 2.x Core query builder

Notes

https://github.com/kolypto/py-jessiql

[amotl]

Hi. I think it is safe to remove the subsystem completely where jessiql was used. It is not worth to be maintained within ctk, because it is deep and not much asked for.