docs: add merge requests templates (et/somenergia-jardiner!21)

* new: add MR and issue templates

* wip: first versions of templates

Co-authored-by: Lucía García Durañona <[email protected]>
Co-authored-by: Pol Monsó Purtí <[email protected]>

.gitlab/issue_templates/default.md

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+# Issue
+
+## This is a
+
+- [ ] Bug
+- [ ] Feature Request
+- [ ] Documentation update
+- [ ] Other (please specify)
+
+## Description
+
+A clear and concise description
+
+## How to Reproduce
+
+Steps to reproduce the behavior. For example:
+
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error `Error: '...'`
+
+## Expected behavior
+
+A clear and concise description of what you expected to happen.
+
+## Screenshots
+
+If applicable, add screenshots to help explain your problem.
+
+## Additional context
+
+Add any other context about the problem here.
+
+## Possible Solution
+
+If you have a possible solution, please describe it here.
+
+## Related Issues and other links
+
+Provide links to the related issues or feature requests, or any other link that could be useful to understand the context of the issue.

.gitlab/merge_request_templates/default.md

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+# New merge request
+
+## Description
+
+This merge request addresses, and describe the problem or user story being addressed.
+
+## Related Issues
+
+Provide links to the related issues or feature requests.
+
+## Related links
+
+- Any link to trello, helpscout, etc. That could be useful to understand the context of the MR.
+
+## General checklist
+
+- [ ] I have run pre-commit hooks locally and fixed any issues.
+- [ ] I have removed any commented out code.
+- [ ] I have removed any TODO comments and added an issue for each one of them.
+- [ ] I have added tests to cover the changes.
+- [ ] I have added documentation to cover the changes.
+
+## dbt checklist
+
+- [ ] This MR includes changes to the dbt models in the project
+- [ ] All models in this MR [follow naming schemes](outline.somenergia.coop)
+- [ ] All models in this MR have a valid `_<scope>__models.yml` file
+- [ ] All models in this MR have a description and are documented, to some extent, throught the `_<scope>__models.yml` file
+- [ ] All models in this MR have valid tags
+- [ ] All models in this MR have a valid `_<scope>__sources.yml` file
+- [ ] All models are formatted using the [`henriblancke.vscode-dbt-formatter`](https://marketplace.visualstudio.com/items?itemName=henriblancke.vscode-dbt-formatter) VSCode extension
+
+## airflow checklist
+
+- [ ] This MR includes changes to the DAGs in the project
+- [ ] All DAGs in this MR have a valid collection of tags
+- [ ] All DAGS in this MR contain a value for `__doc___`, passed to the `doc_md` parameter of the `DAG` constructor
+- [ ] There is maximum one DAG per file
+
+## security checklist
+
+- [ ] This MR does not introduce sensible data in the repository
+
+## deployment checklist
+
+- [ ] This MR does not introduce changes to the deployment process
+
+<!-- If this MR introduces changes to the deployment process, please describe them here. -->
+<!-- ### deployment changes -->
+
+/assign me