The TransformPositionDifferenceRotation logic now has a source to
offset maximum distance setting that will be activated if the
`Apply Offset` is to true. This will ensure the rotation will only
be applied when the source and offset are within the given distances
and anything outside of those distances will be ignored.

Due to a change in Unity 2022.3, there is now no actual need to do
the reflection for replacing a default drawer and in fact the
attempt to get `DrawerKeySet` will return a null, thus causing the
existing error.

The fix is to simply do a null check to prevent the error and the
reflection will simply be ignored on versions of Unity of 2022.3
and above.

The custom collapisble drawer editor modification can now be disabled
by setting a scripting define symbol of
`ZINNIA_IGNORE_CUSTOM_COLLAPSIBLE_DRAWER`.

The various script define symbols that are added by Zinnia are now
documented to make it easier to know when to use them.

The Drag Curve Offset is now a Vector3 allowing the curve offset to
be applied to any axis rather than just the back axis.

To replicate the orignal setting, just change the Z axis to a negative
value and this will replicate the same as the Vector3.back * offset.

The PointsCast now has a RaycastHitValidity rule that will allow
any data within the cast RaycastHit to be used within a rule for
any custom.

Feat/fixes and additions

## [2.16.0](v2.15.0...v2.16.0) (2024-04-17)

#### Features

* **Cast:** add raycast hit validity rule for points cast ([170a241](170a241))
  > The PointsCast now has a RaycastHitValidity rule that will allow any data within the cast RaycastHit to be used within a rule for any custom.
* **Cast:** make drag curve offset a vector3 ([f90f1e8](f90f1e8))
  > The Drag Curve Offset is now a Vector3 allowing the curve offset to be applied to any axis rather than just the back axis.
  >
  > To replicate the orignal setting, just change the Z axis to a negative value and this will replicate the same as the Vector3.back * offset.
* **Data:** add script define to disable collapsible drawer ([36f978b](36f978b))
  > The custom collapisble drawer editor modification can now be disabled by setting a scripting define symbol of `ZINNIA_IGNORE_CUSTOM_COLLAPSIBLE_DRAWER`.
* **README.md:** add section describing custom script define symbols ([3238142](3238142))
  > The various script define symbols that are added by Zinnia are now documented to make it easier to know when to use them.
* **Tracking:** apply distance offset on position difference rotation ([208570d](208570d))
  > The TransformPositionDifferenceRotation logic now has a source to offset maximum distance setting that will be activated if the `Apply Offset` is to true. This will ensure the rotation will only be applied when the source and offset are within the given distances and anything outside of those distances will be ignored.

#### Bug Fixes

* **Data:** prevent null exception in collapsible drawer in 2022.3 ([2ce9cef](2ce9cef))
  > Due to a change in Unity 2022.3, there is now no actual need to do the reflection for replacing a default drawer and in fact the attempt to get `DrawerKeySet` will return a null, thus causing the existing error.
  >
  > The fix is to simply do a null check to prevent the error and the reflection will simply be ignored on versions of Unity of 2022.3 and above.

The word Valid was spelt incorrectly.

The custom Observable List Editor should also be blocked if the
ZINNIA_IGNORE_CUSTOM_INSPECTOR_EDITOR ifdef is set otherwise it will
throw an error becaue it will try and inherit from a class that does
not get created in those circumstances.

Fix/list editor error

### [2.16.1](v2.16.0...v2.16.1) (2024-05-11)

#### Bug Fixes

* **Cast:** correct type in raycast hit validity tooltip ([acc3b49](acc3b49))
  > The word Valid was spelt incorrectly.
* **Data:** block custom list editor if ignore custom inspect is set ([774c112](774c112))
  > The custom Observable List Editor should also be blocked if the ZINNIA_IGNORE_CUSTOM_INSPECTOR_EDITOR ifdef is set otherwise it will throw an error becaue it will try and inherit from a class that does not get created in those circumstances.

The Restricted Attribute Drawer can thrown an exception when using the
Unity Quick Search functionality due to the EditorStyles not being
available to assign to static fields.

Instead these fields are now just assigned in the OnGUI method before
the properties are changed, this seems to resolve the error.

…e-drawer-quicksearch-crash

fix(Attribute): prevent null exception from RestrictedAttributeDrawer

### [2.16.2](v2.16.1...v2.16.2) (2024-09-28)

#### Bug Fixes

* **Attribute:** prevent null exception from RestrictedAttributeDrawer ([3e1c268](3e1c268))
  > The Restricted Attribute Drawer can thrown an exception when using the Unity Quick Search functionality due to the EditorStyles not being available to assign to static fields.
  >
  > Instead these fields are now just assigned in the OnGUI method before the properties are changed, this seems to resolve the error.