Import RichText from ezpublish-kernel and repository-forms

[bdunogier]

EZP-28009

Copies all Rich Text code from ezsystems/ezpublish-kernel and ezsystems/repository-forms.

The first two commits copy files from each package, with a reference to the sha1 the repository was at at this time. The next commit reworks the structure and makes the package work, and the last adds the compiler pass that makes the package compatible with kernel 7.x.

Things that are left

• Remove deprecated code
• Think about configuration compatibility (e.g. config that was below ezpublish.fieldtypes.ezrichtext)
• Consider renaming the package to ezplatform-richtext, as it is not limited to the Field Type

Next tasks

• Push / link the kernel changes ([WIP] Remove richtext ezpublish-kernel#2289)
• Copy files from ezsystems/repository-forms ([WIP] Removed files moved to ezsystems/ezplatform-richtext-fieldtype repository-forms#229)
• Get it to work with "8.0" kernel (kernel without richtext code)
• Decide and apply the structure (ping @alongosz)
• Get unit tests running
• Get API tests running
• Get SPI tests running
• Fix siteaccess aware settings
• Fix custom tags settings

[Nattfarinn]

+43,609 −7

[bdunogier]

So +36,609 ?
Well it is merged anyway :)

[alongosz]

I hereby approve!