Feature: #86422 - TypoScript getText property site
See forge#86422
Description
Site configuration can now be accessed via the 
        get property in TypoScript.
Example:
page.10 = TEXT
page.10.data = site:base
page.10.wrap = This is your base URL: |Where 
        site is the keyword for accessing an aspect, and the following parts are the configuration key(s) to access.
data = site:customConfigKey.nested.valueImpact
Accessing site configuration is now possible in TypoScript, which enables to store site specific configuration options in one central place and allows usage of that configuration from different contexts. While this sounds similar to using TypoScript, with using site configuration this may also be used from backend or CLI context as long as the rootPageId of the site is known. To avoid duplicating configuration options, TypoScript can now access these properties, too.