fix(multi-target-docker-images): split logic into multiple files

Closes #90

See merge request !103

chore: Configure Renovate

See merge request !95

fix(common-pipeline): correct include path for auto-devops template

See merge request !102

fix: correction to the documented ci template path for auto-devops.gitlab-ci.yml

See merge request !101

chore: rename `review` stage to match gcp workspace naming

See merge request !100

Added a new `development` stage to `./auto-devops-stages.yml`. Renamed the `review` stage to align
with Google Cloud workspace naming conventions.

feat: improve modified container_scanning job

See merge request !99

feat: modify container_scanning job

See merge request !98

feat(pre-commit): move to v4 of pre-commit

See merge request !97

Pre-commit version 4 has landed. Move to that version and also allow
explicit version selection via various PRE_COMMIT_IMAGE_... variables.

feat: enable manual triggers for development plan and development apply jobs

Closes #84

See merge request !96

Allow manual triggers for development plan and development apply on all branches.

Closes #84

feat!: change release-it "hotfix" branch prefix

Closes #80

See merge request !94

The `hotfix-` prefix used as a "magic branch name" for release-it was
being used organically by engineers without intending to create
releases. Rather than try to boil the ocean and change the instincts of
each engineer, in #80 we agreed to change the prefix to `release/fix-`.

This is a breaking change since behaviour which worked previously now
does not.

Closes #80

feat: build docker stages

Closes #78

See merge request !92

also add documentation for how to use the multi target docker
images template