Prettier/ESLint Configuration Updates

[daveseah]

I've updated ESLint and Prettier packages. The old .eslintrc.json file has been replaced with .eslintrc.js which imports a separate .eslint-rules.js file that has our specific overrides.

CHANGES

• The new ESLint configuration is based on the GEMSTEP configuration with all the Typescript stuff stripped out. In extends, we start with the recommended ESLint and React rules, and override any formatting-related rules with the Prettier overrides. The rules are then overriding additional rules that we find annoying via .eslintrc-rules.js.
• Workspace settings updated to include module snippets, recommended extensions, and configure use of Prettier formatter.
• .prettierignore has been removed

HOW TO FIX YOUR CODE

As you find problem files, open the PROBLEMS tab in the terminal window and see what pops up!

SRI-STYLE SECTION COMMENTS

There are "regex highlighting" expressions added to the .code-workspace project file that will draw comment lines beginning with /// as blue. These are used to make it easier to find code sections.

To quickly get a scaffolded Sri-style module, use the command Snippets: Insert Snippet and choose urp-module-elements to get this: