Added WebAuthn quickstart

[FroMage]

Check list:

Your pull request:

• targets the development branch
• uses the 999-SNAPSHOT version of Quarkus
• has tests (mvn clean test)
• works in native (mvn clean package -Pnative)
• has native tests (mvn clean verify -Pnative)
• makes sure the associated guide must not be updated
• links the guide update pull request (if needed)
• updates or creates the README.md file (with build and run instructions)
• for new quickstart, is located in the directory component-quickstart
• for new quickstart, is added to the root pom.xml and README.md

This is draft, because the extention PR is currently not working: quarkusio/quarkus#24316

[FroMage]

Rebased, but the native test doesn't work with Quarkus main ATM, working on a PR to fix this.

[FroMage]

Here's the Quarkus PR: quarkusio/quarkus#25174

[FroMage]

PR got merged, we're all good, though perhaps we need a review?

[sberyozkin]

May be it is worth renaming RenardeCookieFilter to something more neutral in context of these tests as it can not be obvious to some users why it starts from Renarde ?
By the way ss far as Renarde is concerned, I think it would be good to have https://quarkus.io/version/main/guides/security-webauthn updated, its References section to link to Renarde as a concrete application which uses Quarkus WebAuthn

[sberyozkin]

@FroMage It probably does not matter as it is a test specific resource only, we can merge as is

[FroMage]

Thanks!