feat: favicons as a realfavicongenerator set per site, like ep-reisen and snowbreak

The theme registered 26 icons (16 to 196 px PNGs, a GIF, eleven Apple touch
icons) that current browsers no longer need. It now renders the five tags of
the set realfavicongenerator.net generates (96 px PNG, SVG, ICO, 180 px
Apple touch icon, web manifest) plus apple-mobile-web-app-title, from two
constants: faviconPath, the folder in fileadmin the set was uploaded to
(default: the E&P set), and faviconAppTitle.

The ICO also matches the favicon parser of yoast's snippet preview now
(rel="shortcut icon" directly followed by href), which missed the old tags
and fell back to a /favicon.ico none of the sites has.

cllt and alvac, which showed the theme's E&P icon, get the E&P set. Sites
whose own template sets page.shortcutIcon and removes headerData.333
(ski-boarderweek, snowzone, ser) keep their icon until they have a set; the
remaining ICOs of these three stay until then. ep-reisen and snowbreak still
override the tags with the same markup in their templates.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

packages/ep_theme/Configuration/TypoScript/constants.typoscript

@@ -129,6 +129,10 @@ plugin.tx_eptheme {
 		defaultBodyclass = subpage
 		# cat=eptheme/500/120; type=string; label=Logo image
 		logoImage = EXT:ep_theme/Resources/Public/images/logo_wide.svg
+		# cat=eptheme/500/125; type=string; label=Favicon folder (realfavicongenerator set, without leading/trailing slash)
+		faviconPath = fileadmin/user_upload/favicon/ep
+		# cat=eptheme/500/126; type=string; label=Home screen title (apple-mobile-web-app-title)
+		faviconAppTitle = E&P Reisen und Events
 		# cat=eptheme/500/130; type=string; label=Force active topnav uid
 		forceActiveTopnavUid =
 		# cat=eptheme/500/140; type=string; label=Booking URL template code