TINY-12193: Changelogs (tinymce#10674)

* TINY-12193: Changelogs

* TINY-12193: Merge changelog

* TINY-12193: Add last minute changelog

* TINY-12193: Bump dates

* Bump resources

TINY-12925: Adding changelog item (tinymce#10605)

* TINY-12925: Added changelogs

* TINY-12925: Grammar fixes

* TINY-12925: Removed trailing line

TINY-12921: Batched and merged changelog (tinymce#10600)

* TINY-12921: Batched changelog

* TINY-12921: Merged changelog

TINY-12107: Release changelog for 8.1.0 (tinymce#10594)

* TINY-12107: Release changelog for 8.1.0

* TINY-12107: Fix and merge changelogs for 8.1.0

TINY-12577: Changelog prep 8.0.2 (tinymce#10534)

* TINY-12577: Fix changelog

* TINY-12577: Changelog prep

* TINY-12577: Merged changelog

TINY-12585: Update links (tinymce#10496)

TINY-12559: Update README to reflect TinyMCE 8 version and related do…

…cumentation links. (tinymce#10489)

TINY-12105: Changelog (tinymce#10384)

TINY-12104: Changelog (tinymce#10383)

* TINY-12104: Changelog

* TINY-12104: Merge changelog for release

TINY-11904: Batched changelog (tinymce#10326)

* TINY-11904: Batched changelogs

* TINY-11904: Updated date and some rewording

* TINY-11904: Manually added hotfix

* TINY-11904: Minor fix

* TINY-11904: Bumped release date

* TINY-11904: Merge

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Co-authored-by: Seb <[email protected]>