This lets Renovate periodically refresh flake.lock, keeping the
nixpkgs and agru inputs of the development shell up to date.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Prevents Renovate from proposing "major" updates to the registry-only
calver tags (vYY.MM[.PATCH]), which break further updates and
self-building. See the previous commit for details.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Reuse:
- 096b85bd96/docs/configuring-playbook-email2matrix.md
- 096b85bd96/docs/configuring-playbook-bridge-appservice-webhooks.md

Signed-off-by: Suguru Hirahara <did🔑z6MkvVZk1A3KBApWJXv2Ju4H14ErDfRGxh8zxdXSZ4vACDg5>

This makes it possible for Renovate to detect updates such as from `x.x.x-0` to `x.x.x-1`.

References:
- https://docs.renovatebot.com/modules/versioning/loose/
- https://docs.renovatebot.com/configuration-options/#versioning

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

Related to:

- https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/3196
- ce893c1b22
- https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/3200#issuecomment-2491780481
- https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/3856

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

Related to https://etke.cc/news/d3uw4utq4t3_rpxicrrfqqou_ynmptqjgk95pt-3n2s/

Hopefully, this makes it run faster and prevents potential false-positives.

Although.. a false-positive is unlikely anyway.

This adds a custom regex manager so dependencies in yml files can be found.