* Drop ext-intl in favour of a polyfill

This reverts a few minor things that were already rolled out in master
in all my enthousiasm

- Adds several commands to update/generate translations and to detect unused translations.
- Adds a new workflow to add new translation strings from Twig- and/or Php-files into the .po-files for every language.
- Runs .mo-file generation as part of the build-process.

* Use best available encryption in pwgen.php

* Add dependency on sodium-extension

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Co-authored-by: Tim van Dijen <tvdijen@gmail.com>

* Replace composer-dependency with a phar-file

* Update lock-file

This reverts commit 153d109d.

* Migrate metadata-extensions to new interface

* Bump saml2-library

* Migrate md:Organization to new interface

* Bump saml2 library

* Drop hint.cidr functionality; use mdui:DiscoHints/IPHint instead

* Migrate md:KeyDescriptor to new interface

* Bump saml2 library

* Migrate ds-elements to new interface from xml-security lib

* Migrate md:ContactPerson to new interface

* Fix hosted SP metadata generation

* Fix codesniffer issues

* Bump saml2-lib

* Migrate md:NameIDFormat to new interface

* Migrate (indexed) endpoints to new interface

* Fix for NameIDFormat

* Fix minor bugs

* Fix long lines

* Fix array key initializatino

* Only add isRequired attribute when it's true

* Update composer-file

* Remove unnecessary test; the saml2-lib ensures a specs-compliant representation of an AttributeConsumerService-element

* Fix annotation

* Migrate HTTP::redirect

* Migrate HTTP::redirectTrustedURL

* Migrate HTTP::redirectUntrustedURL

* Migrate HTTP::submitPOSTData

* Temporarily revert to make phpunit work

* Migrate logout handlers

* Remove unnecessary assertion & simplify logics

* Remove unnecessary assertion & add new one to check response type

* Remove unnecessary assertion & rationalize code

* Migrate IdPDisco

* Migrate ProcessingChain

* Fix return-type & drop unnecessary use-statement

* Address review comments

* Do not add caching headers at all

* Fix type-confusions

* Migrate saml2 bindings

* Migrate completeAuth

* Migrate handleLogout

* Migrate some more

* Migrate a whole lot more (messy)

* Migrate logout

* Migrate a whole lot more (also messy)

* Many fixes

* Raise coverage

* Psalm: Ignore exteranl adfs-module

* Replace use of _GET globals

* Migrate bindings (send)

* Migrate bindings (receive)

* Fix psalm-dev

* Fix assertion

* s/subclassOf/isInstanceOf

* Fix type-confusion in logout handlers

* Update container

* Bump saml2 + adfs

* Rename namespace