Add Spellcheck

[svennergr]

Reason to implement spellcheck

Grafana Plugins are built with a Drone pipeline. A step was added to that pipeline, that datasources should comply with a "spellcheck". In order to not break builds with the OpenSearch datasource, spellchecks need to be added to the main and v1.2.x branch of OpenSearch.

Steps to implement spellcheck

Your pipelines will fail if it can't find cspell.config.json in your plugin repo. So add one as described in https://github.com/grafana/grafana-drone-extension/pull/189 or follow the following steps.

1. yarn add -D cspell@6.13.3 to install cspell local to your repo
2. Add "spellcheck": "cspell -c cspell.config.json \"**/*.{ts,tsx,js,go,md,mdx,yml,yaml,json,scss,css}\"" to package.json scripts section
3. echo '{ "ignorePaths": ["node_modules/**","dist/**"], "words":["grafana","datasource","datasources"]}' > cspell.config.json to create a cspell.config.json file
4. Run yarn spellcheck to see if any errors
5. If errors found, either fix them or add to ignorePaths or words section of the cspell.config.json

Sample PR to add spellcheck to your repo : https://github.com/grafana/athena-datasource/pull/185/files

[gwdawson]

Added to main and backported to v1.2.x