DOC-3147: Migration guide from TinyMCE 7 to TinyMCE 8. (#3781)

* DOC-3147: Migration guide from TinyMCE 7 to TinyMCE 8.

* DOC-3238: Enhance migration guide with detailed checklists and improves crossorigin entry.

* Update modules/ROOT/pages/migration-from-7x.adoc

Co-authored-by: Andrew Herron <[email protected]>

* Update modules/ROOT/pages/migration-from-7x.adoc

Co-authored-by: Andrew Herron <[email protected]>

* Update modules/ROOT/pages/migration-from-7x.adoc

Co-authored-by: Andrew Herron <[email protected]>

* Update modules/ROOT/pages/migration-from-7x.adoc

Co-authored-by: Andrew Herron <[email protected]>

* Update modules/ROOT/pages/migration-from-7x.adoc

Co-authored-by: Andrew Herron <[email protected]>

* Update modules/ROOT/pages/migration-from-7x.adoc

Co-authored-by: Andrew Herron <[email protected]>

* Update modules/ROOT/pages/migration-from-7x.adoc

Co-authored-by: Andrew Herron <[email protected]>

* Update modules/ROOT/pages/migration-from-7x.adoc

Co-authored-by: Andrew Herron <[email protected]>

* Update modules/ROOT/pages/migration-from-7x.adoc

* DOC-3147: document structure changes, to include various suggestions, edits, improvements.

* DOC-3147: Update migration guide to clarify license key manager directory and initialization steps.

* DOC-2147: Add pagebreak_split_block breaking change.

* DOC-3146: downgrade pagebreak_split_block lvl to Low.

* Update modules/ROOT/pages/migration-from-7x.adoc

Co-authored-by: Andrew Herron <[email protected]>

* Update modules/ROOT/pages/migration-from-7x.adoc

* Update modules/ROOT/pages/migration-from-7x.adoc

* Update modules/ROOT/pages/migration-from-7x.adoc

* Update modules/ROOT/pages/migration-from-7x.adoc

* Update modules/ROOT/pages/migration-from-7x.adoc

* DOC-3147: Update migration guide and security documentation for DOMPurify changes, and fix for ref numbers.

* DOC-3147: Remove content handling updates from migration guide, not breaking change.

* DOC-3147: Update migration quick ref table to reflect changes in DOMPurify sanitization.

* DOC-3147: Fix broken table link.

* DOC-3147: Update documentBaseUrl to include updated information.

* DOC-3147: Refine migration guide for TinyMCE 8.0: update breaking change descriptions, enhance license key system details, and clarify DOMPurify sanitization impacts.

* Update modules/ROOT/pages/migration-from-7x.adoc

Co-authored-by: michalnieruchalski-tiugo <[email protected]>

* Update modules/ROOT/pages/migration-from-7x.adoc

* DOC-3147: Remove reverted pagebreak_split_block, updated Split button CSS structure updates, general doc structural changes.

* Update modules/ROOT/pages/migration-from-7x.adoc

* Update modules/ROOT/pages/migration-from-7x.adoc

* DOC-2147: fix table, and add ask-ai-widget png file.

* Update modules/ROOT/pages/migration-from-7x.adoc

* Apply suggestions from code review

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

* Update modules/ROOT/pages/migration-from-7x.adoc

* Update modules/ROOT/pages/migration-from-7x.adoc

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Co-authored-by: Andrew Herron <[email protected]>
Co-authored-by: michalnieruchalski-tiugo <[email protected]>
Co-authored-by: Shan <[email protected]>

Author: 4 people