Ormar

* Added save status -> you can check if model is saved with `ModelInstance.saved` property
* Model is saved after `save/update/load/upsert` method on model
* Model is saved after `create/get/first/all/get_or_create/update_or_create` method
* Model is saved when passed to `bulk_update` and `bulk_create`
* Model is saved after adding/removing `ManyToMany` related objects (through model instance auto saved/deleted)
* Model is **not** saved after change of any own field (including pk as `Model.pk` alias)
* Model is **not** saved after adding/removing `ForeignKey` related object (fk column not saved)
* Model is **not** saved after instantation with `__init__` (w/o `QuerySet.create` or before calling `save`)
* Added `Model.upsert(**kwargs)` that performs `save()` if pk not set otherwise `update(**kwargs)`
* Added `Model.save_related(follow=False)` that iterates all related objects in all relations and checks if they are saved. If not it calls `upsert()` on each of them.
* **Breaking:** added raising exceptions if `add`-ing/`remove`-ing not saved (pk is None) models to `ManyToMany` relation
* Allow passing dictionaries and sets to fields and exclude_fields
* Auto translate str and lists to dicts for fields and exclude_fields
* **Breaking:** passing nested models to fields and exclude_fields is now by related ForeignKey name and not by target model name
* Performance optimizations - in modelproxy, newbasemodel - > less queries, some properties are cached on models
* Cleanup of unused relations code
* Optional performance dependency orjson added (**strongly recommended**)
* Updated docs

* add exclude_fields() method to exclude fields from sql
* refactor column names setting (aliases)
* fix ordering by for column with aliases
* additional tests for fields and exclude_fields
* update docs

Add order_by to QuerySet
Update docs

* Changed notation in Model definition -> now use name = ormar.Field() not name: ormar.Field()
* Note that old notation is still supported but deprecated and will not play nice with static checkers like mypy and pydantic pycharm plugin
* Type hint docs and test
* Use mypy for tests also not, only ormar package
* Fix scale and precision translation with max_digits and decimal_places pydantic Decimal field
* Update docs - add best practices for dependencies
* Refactor metaclass and model_fields to play nice with type hints
* Add mypy and pydantic plugin to docs
* Expand the docs on ManyToMany relation