chore: change eslint config to use common config

This issue is one of the steps towards implementation of Standardise TypeScript config (tsc, eslint) acr... (gitlab-org/editor-extensions/meta#85 - closed) and closes Switch vscode-extension to common typescript co... (gitlab-org/editor-extensions/meta#123 - closed).

The goal of this change is to add a common typescript from @gitlab/eslint-plugin configuration that we can use for all our TypeScript code bases.