Surrealist

- add to_surreal_datetime_str and to_datetime functions, cause SurealDB has a specific datetime format
- minor improvements for documentation, examples and tests

- add IF NOT EXISTS for all DEFINE statements
- add IF EXISTS for all REMOVE statements
- improvements for documentation, examples and tests

- using IF EXISTS in all tables removing
- improve documentation
- add some tests for string::semver

- database now can use RELATE, RETURN, DEFINE TOKEN
- Select query now can use iterator to traverse results, [see ](https://github.com/kotolex/surrealist/tree/master?tab=readme-ov-file#iteration-on-select)
- Database now can define/remove index, analyzer and scope
- QL-constructor added, you can now generate queries and use all features of QL
- result now has helpers like is_empty, to_dict, id, ids, get
- websocket connection works faster
- a lot more examples added
- updated readme on all updates and features
- bug fixes
- improve documentation and examples

What's Changed
* Feature/ql generator by kotolex in https://github.com/kotolex/surrealist/pull/1
* refactoring by kotolex in https://github.com/kotolex/surrealist/pull/14
* Table and Database improve by kotolex in https://github.com/kotolex/surrealist/pull/19
* Feature/define by kotolex in https://github.com/kotolex/surrealist/pull/21
* Feature/iterator by kotolex in https://github.com/kotolex/surrealist/pull/22
* Database improve and refactor by kotolex in https://github.com/kotolex/surrealist/pull/27

New Contributors
* kotolex made their first contribution in https://github.com/kotolex/surrealist/pull/1

**Full Changelog**: https://github.com/kotolex/surrealist/commits/v0.2.3

- fix tests and examples

- versionstamp is now can be used in SINCE statement for SHOW
- by default, if no SINCE were specified Show statement generates SINCE 1
- add DEFINE CONFIG statement, only Database object can use it
- add examples and tests for Show
- add examples and tests for DEFINE CONFIG
- count for non-existent table now returns error (not 0)
- fix tests