Sqllex

- Fixed issue 25, now only select-like methods returns data, other methods don't
- Tests update
- SQLStatement and SQLRequest got __bool__ method
- Redame update

Co-Authored-By: kingabzpro

- Bugfix issue 24
"BUG | It should be FROM not TABLE 24"
- UPD Typing for select-like methods

Co-Authored-By: kingabzpro

- Docs remastering
- Removed rudimental code parts
- "wiki" dir removed
- Minor refactoring

- Issue 18 fixed, exception for sqlite3.OperationalError: no such table: PRAGMA_TABLE_INFO

- Issue 18 fixed, WHERE argument to update is not required anymore, without WHERE it change all rows in the table

- Issue 17 fixed, SELECT-like methods now **allways** returns List[List[...]] objects
- Tests remastering
- Code refactoring
- Readme upd