Consistent page path/id methods

[distantnative]

Method	Description	Example	Alternative?
$page→dirname()	full directory name with num and uid	2_project-b	$page→dirname()
$page→diruri()	full path with sorting num und uid	1_projects/2_project-b	$page→dirpath()
$page→id()	path with uid	projects/project-b	$page→path(false)
$page→uri()	path with translated slugs	projekte/projekt-b	$page→path($lang)
$page→uid()	slug but always untranslated	project-b	$page→slug(false)
$page→slug()	folder name or translated slug	projekt-b	$page→slug($lang)
$page→uuid()	UUID with schema	page://12345678-90ab-cdef-1234-567890abcdef

We should try to pave the path in Kirby 3.8, meaning

• all alternative methods should be working as intended in the future
• where needed methods (or parameter usage) should be marked as deprecated in the comments/docblocks
• go through code base and alter references to be consistent with new naming
• docs need to be updated everywhere to only show new methods
• real deprecation warnings should only be thrown after docs have been updated for a significant amount of time (6-12 months)
• removing deprecated methods should follow one major version after deprecation notice

[github-actions]

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