[FEATURE] By default generate classes for body tag for nuxt-typo3 (#803)

- By default generate pid-[PageID] class & layout-[layout-name] for body tag

- TYPO3 dev can expand default classes via `page.bodyTagAdd` (attributes, are merged, class attribute is also merged by default), so if dev adds custom class via `page.bodyTagAdd` result will be for example `class="pid-1 layout-layout-0 custom-class"`.

 If BE wants to completely overwrite values of body attributes it should communicate it via `config.headless.overwriteBodyTag = 1`. Flag changes behaviour by overwriting default values by values of `page.bodyTagAdd`

Update emconf to 3.4.3

Add barebone Sets config, so other extensions could start rely on (#793)

Update-version-to-4.4.1 (#787)

[TASK] Set version 4.4.0 (#769)

Update version to 4.3.2 (#744)

[DOCS] Mention XML sitemap configuration (#735)

[BUGFIX] Fix warning if `as` is not set (#729)

[TASK] Fix documentation rendering (#727)

Resolves: #722

[BUGFIX] Fix crash in BE context (#705)