Release 4.3.109

Marshal String Encodings (#1283)

* Add new encoding tests and implementation

* Remove old marshal stuff and return an empty string instead of throwing

* update tests

* Case change

* Update utf16 codepoint encoder

* Add some extra functions

* copyTo function for view

* single bounds check for utf8 encode

* marshal writes

* remove some conversion issues

* Remove un-needed cast

* Remove questionable implicit view to pointer conversions

* int returns

* switch to a dedicated codepoint function for utf16

* move to a dedicated codepoint function for utf8 as well

* Fix incorrect index reuse

* Add new view extension cstring function tests

* Add a smart strings guard

* const view

* const ref marshal read and writes

* more const ref and less object copying

* Fix index reuse issue

* separate build xml for encoding

* Don't return hx::Throw result in non smart string case

* Revert "separate build xml for encoding"

This reverts commit 695e134657b2ae014de2d2c4cd88544eb0d62537.

* better smart string handling and shuffle some functions in lower hxcpp

* Revert some version guards

* Add pointer check define

* I don't understand why this is needed

No changes were made in this area, dev haxe + hxcpp also fails to build that test locally for me

* remove addition since there must be something else weird going on

* Could it really be this?

* Dynamic char32_t support

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Co-authored-by: Aidan Lee <aidan.lee@evcam.com>