feat: add common ci

[JaeAeich]

Summary by Sourcery

Add a common CI configuration for PR evaluations, including workflows for detecting unresolved conflicts, running pre-commit checks, and validating semantic PR titles. Include documentation for each action to guide users on their usage and configuration.

CI:

• Introduce a new CI workflow for PR evaluations, including checks for unresolved conflicts, pre-commit checks, and semantic PR title validation.

Documentation:

• Add documentation for the Semantic PR Check, Pre-Commit Evaluations, and Detect Unresolved Conflicts actions, detailing their purpose, prerequisites, and inputs.

[sourcery-ai[bot]]

Reviewer's Guide by Sourcery

This pull request introduces a common CI configuration for pull request evaluations. It adds several GitHub Actions workflows and their corresponding action files to perform various checks on pull requests, including detecting unresolved conflicts, running pre-commit checks, and validating semantic PR titles.

File-Level Changes

Change	Details	Files
Added a GitHub Actions workflow for PR evaluations	Configured workflow to run on push to main and various pull request events Added job to detect unresolved conflicts Added job for pre-commit checks Added job for semantic PR title check	actions/common/pr-evaluations/example.yaml
Implemented semantic PR title check action	Created composite action for checking PR title semantics Configured allowed types for semantic PR titles Added check for PR title length (max 50 characters) Included error message for non-compliant PR titles	actions/common/pr-evaluations/semantic-pr-title/action.yaml actions/common/pr-evaluations/semantic-pr-title/README.md
Added pre-commit check action	Created composite action for running pre-commit checks Added step to install pre-commit Configured action to run all pre-commit checks defined in .pre-commit-config.yaml	actions/common/pr-evaluations/pre-commit/action.yaml actions/common/pr-evaluations/pre-commit/README.md
Implemented unresolved conflicts detection action	Created composite action for detecting unresolved merge conflicts Added step to check for merge conflict markers in the repository Configured action to exit with an error if conflict markers are found	actions/common/pr-evaluations/unresolved-conflicts/action.yaml actions/common/pr-evaluations/unresolved-conflicts/README.md

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