Add Clipping to displaybuffer (#4271)

* adding Clipping support to the displaybuffer
- add rect structure

* removed unused define

* add missing property for storing the clipped areas

* include log header

* Move Rect method's code to cpp file
- removed obsolete remarks

* fixed reported issues

* make Rect class methods public

* clang fix

* Remove commented code

* Renaming clipping methods

* Multiple changes:
- replaced 32766 with VALUE_NO_SET
- fixed the way *_clipping(left, top, right, bottom) is stored
- add `is_clipping();`
- make sure that all clipped region are closed after `do_update_()`
- rename de parameters for `Rect::expand();`

* remove unneeded space

* replace define with static const uint8_t

* correcting my copy paste mistake

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Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>

.gitignore

@@ -128,3 +128,5 @@ tests/.esphome/
 
 sdkconfig.*
 !sdkconfig.defaults
+
+.tests/