feat(ci): improve release process

[nilsgstrabo]

No description provided.

[Copilot]

Pull Request Overview

This PR implements improvements to the release process by introducing automated workflows and configuration for changelog generation. The changes establish a trunk-based development workflow with automated release pull request creation and GitHub releases.

• Adds git-cliff configuration for automated changelog generation using conventional commits
• Introduces GitHub workflows for preparing release PRs, creating releases, and building/deploying Docker images
• Updates documentation to explain the new development and release processes

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
cliff.toml	Adds git-cliff configuration for changelog generation with commit parsing and formatting rules
README.md	Documents the new trunk-based development workflow and automated release process
.github/workflows/prepare-release-pr.yml	Workflow to create release pull requests when changes are pushed to main
.github/workflows/pr.yaml	Updates PR workflow with permissions and newer action version
.github/workflows/deploy.yml	Workflow to build and deploy Docker images when tags are created
.github/workflows/create-releases.yml	Workflow to create GitHub releases from approved release pull requests

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