Feat: Have RegexRouterRule take ordered array

[Falx]

📁 Related issues

#302
#947

✍️ Description

This PR changes the Regex to ResourceStore mapping from a Map datastructure to an Array datastructure. The idea is that regexes are now tested in a fallthrough order.

This allows for more predictable routing and even allows for a catchall /.*/ regex at the end as suggested in #947. This change will however not introduce any catching/default behaviour, it will only setup the datastructure to allow this in the future. Any such change would be better introduced as a fix for #947 itself.

The first two comments, called fix: Revert: ..., are from the parent fix/#298 branch, once merged, these will be removed after a rebase. So only the latest commit should be reviewed here.

✅ PR check list

Before this pull request can be merged, a core maintainer will check whether

• this PR is labeled with the correct semver label
  • semver.patch: Backwards compatible bug fixes.
  • semver.minor: Backwards compatible feature additions.
  • semver.major: Breaking changes. This includes changing interfaces or configuration behaviour.
• the correct branch is targeted. Patch updates can target main, other changes should target the latest versions/* branch.
• the RELEASE_NOTES.md document in case of relevant feature or config changes.
• any relevant documentation was updated to reflect the changes in this PR.

[joachimvh]

Looks good, minor refactor comments.