ESLint improvements

[dimaMachina]

Below are my vision about improving ESLint linting in graphiql repository, it will be done with separated PRs to make review easy!

• fix all warnings to have clear ESLint output 🛠️ ESLint: clean all ESLint warnings, add --max-warnings=0 and --cache flags #2962
• add --max-warnings=0 and --cache CLI flags 🛠️ ESLint: clean all ESLint warnings, add --max-warnings=0 and --cache flags #2962
• extend plugin:jest/recommended config for test files was already extended
• extend plugin:cypress/recommended config for e2e tests extend plugin:cypress/recommended config #3035
• extend plugin:import/recommended config extends plugin:import/recommended and fix warnings #2922
• extend plugin:jsx-a11y/recommended config
• extend plugin:@typescript-eslint/recommended config [wip] 🛠️ ESLint: extends plugin:@typescript-eslint/recommended config #2967
• extend plugin:@typescript-eslint/recommended-requiring-type-checking config
• ensure all code-blocks in markdown files doesn't contain syntax errors with eslint-plugin-mdx

[jonathanawesome]

@B2o5T very much looking forward to these changes!

[dimaMachina]

Most of them were improved