* Add missing dependency to xwiki-platform-legacy-office-viewer in
    distribution-war-legacydependencies
  * Refactor the pom of xwiki-platform-legacy-office-viewer to not use
    aspectj anymore since it wasn't needed in the first place

* fix conflict with legacy dependencies

  * Fix again legacy dependencies

  * Fix legacy pom
  * Exclude the not legacy jar from war-legacydependencies to avoid
    duplicated classes

  * Move DocumentVersionReference to model-api in proper package
  * Create a new legacy module for extension-handler-xar
  * Move the old class in it and mark it deprecated
  * Move old usage of the old class, to use new one
  * Create an aspect for the DocumentUnifiedDiff constructor for
    preserving backward compatibility
  * Update xwiki-platform-distribution-war-legacydependencies to include
    the new legacy module

XWIKI-20064: Cannot use the DefaultResourceReferenceSerializer component with a TemporaryResourceReference

* we still need the old event in the default WAR as the UI is part of the standard flavor

- exclude dependencies we don't want in legacy mode

- Update the wiki macro xar files to use the new `defaultCategories` property
- Update the java macro to call `setDefaultCategories`
- Introduction of `xwiki-platform-legacy-rendering-wikimacro` and `xwiki-platform-legacy-rendering-wikimacro-store`
- Add an around aspect on `DefaultWikiMacroFactory.getDefaultCategories` to fallback to `defaultCategory` if no categories are found by the default implementation
- Move `WikiMacroConstants.MACRO_DEFAULT_CATEGORY_PROPERTY` to legacy
- Update `WikiMacroClassDocumentInitializer` to initialize `defaultCategories` instead of `defaultCategory`
- Add `xwiki-platform-legacy-rendering-wikimacro-store` to `xwiki-platform-distribution-war-legacydependencies`
- Move `org.xwiki.rendering.macro.wikibridge.WikiMacroDescriptor.Builder#defaultCategory` to legacy
- Move `WikiMacroDescriptor.getDefaultCategory` to legacy

* we still need the old event in the default WAR as the UI is part of the standard flavor

- exclude dependencies we don't want in legacy mode

- Update the wiki macro xar files to use the new `defaultCategories` property
- Update the java macro to call `setDefaultCategories`
- Introduction of `xwiki-platform-legacy-rendering-wikimacro` and `xwiki-platform-legacy-rendering-wikimacro-store`
- Add an around aspect on `DefaultWikiMacroFactory.getDefaultCategories` to fallback to `defaultCategory` if no categories are found by the default implementation
- Move `WikiMacroConstants.MACRO_DEFAULT_CATEGORY_PROPERTY` to legacy
- Update `WikiMacroClassDocumentInitializer` to initialize `defaultCategories` instead of `defaultCategory`
- Add `xwiki-platform-legacy-rendering-wikimacro-store` to `xwiki-platform-distribution-war-legacydependencies`
- Move `org.xwiki.rendering.macro.wikibridge.WikiMacroDescriptor.Builder#defaultCategory` to legacy
- Move `WikiMacroDescriptor.getDefaultCategory` to legacy

* exclude dependencies we don't want in legacy mode

* exclude a dependency we don't want in legacy mode

Replace xwiki-rendering-transformation-macro with xwiki-rendering-legacy-transformation-macro in xwiki-platform-distribution-war-legacydependencies.