Add hook for including Static TypoScript after all Static Templates are included
We already have a hook at the top of t3lib_tstemplate->includeStaticTypoScriptSources() for including the old static templates. For other extensions such as templavoila_framework, it would be helpful to have an identical hook at the end of this method.
Placing the hook at the end allows skins in the templavoila_framework to manipulate TypoScript settings from extensions on a per skin basis. This is useful, for example, when a skin needs to override the default rendering of a content element as defined in CSS Styled Content.
(issue imported from #M14065)