* Define repo-specific labels.
This commit adds a `.appends/.github/labels.yml` file, which contains the repo-specific labels. This file will automatically be combined with the Exercism-wide labels defined in https://github.com/exercism/org-wide-files/blob/main/global-files/.github/labels.yml to form the `.github/labels.yml` file.
* Define the labels used in this repo.
This commit adds a `.github/labels.yml` file, which contains the full list of labels that this repo can use. This file is a combination of the `.appends/.github/labels.yml` file and the Exercism-wide labels defined in https://github.com/exercism/org-wide-files/blob/main/global-files/.github/labels.yml.
* Add a GitHub Actions workflow to automatically sync the repository labels.
This commit adds a `.github/workflow/sync-labels.yml` file, which defines a workflow that syncs this repository's labels with the contents of the `.github/labels.yml` file. The labels are synced automatically whenever the `.github/labels.yml` file changes.
The `.appends/.github/labels.yml` file contains all the labels that are currently used in this repo. The `.github/labels.yml` file will contain the full list of labels that this repo can use, which will be a combination of the `.appends/.github/labels.yml` file and a centrally-managed `labels.yml` file. We'll automatically sync any changes, which allows us to guarantee that all the track repositories will have a pre-determined set of labels, augmented with any custom labels defined in the `.appends/.github/labels.yml` file.
1. `ace_editor_language`: the language identifier for the Ace editor that is used to edit code on the website
2. `highlightjs_language`: the language identifier for Highlight.js which is used to highlight code on the website
