Add Catalan language

[rogodra]

Pull Request Template for Home Assistant / Lovelace Card Repository

Overview

Add Catalan language. I created the file ca.json, and added the Catalan language in localize.ts. Thank you for this card.

Type of Change

• [ ] Bugfix
• [ ] New feature
• [x] Enhancement
• [ ] Documentation update
• [ ] Refactoring
• [ ] Other (please describe):

Checklist

Please ensure that you have completed the following tasks before submitting your pull request:

• [x] I have read the contributing guidelines for this project.
• [x] I have tested my changes against the dev branch (or another appropriate branch) and verified that they are working as expected.
• [x] I have updated the documentation (if applicable) to reflect my changes.
• [x] My changes adhere to the repository's code style guidelines.
• [x] My changes do not introduce any breaking changes or unexpected behaviors.

Related Issues / Pull Requests

Please include any related issues or pull requests that this change is associated with, and use the appropriate keywords (Closes, Fixes, Resolves) to automatically close the related issues when this pull request is merged.

• Closes #issue_number
• Fixes #issue_number
• Resolves #issue_number

Additional Details

Please provide any additional information that you feel is relevant to this pull request, such as screenshots, code snippets, or examples.