Proto drupal starter

[kmonahan]

• [x] ddev drupal-setup command installs Drupal-specific packages, copies ENV variables to .env.local.example, and copies the starter templates (the ones we think people might use, not the ones there for example only)
• [x] ddev service and command renamed to frontend to match our agreed-upon naming convention
• [x] Utility functions in place for menus and pagination, as well as modifications to/extensions of Next for Drupal
• [x] Codegen scripts set up to generate types from queries
• [x] Basic article and page templates added to starterkits (these are the ones that get copied in the setup step)
• [x] Examples of querying for and rendering menus (including using Menu Items Extra), header, footer, images (including with an image style), and paragraphs
• [x] Examples of querying for and rendering views (including a teaser view mode equivalent example)
• [x] Pagination component added to /source
• [x] Base project READMEs updated and additional Drupal-specific README exists (if needed)
• [x] Paragraph and content type mapping updated to use agreed-upon cleaner switch statement approach
• [x] Merged package.json file puts dependencies and devDependencies in alphabetical order
• [x] Reorganize directories based on initial review feedback
• [x] Exit from setup script if files already exist
• [ ] Add starter integration templates for paragraphs included in drupal-project

[kmonahan]

@coreylafferty @mdrayer @mrclay Made some additional directory structure changes beyond what we discussed at the check-in, because I realized that tsc fails on any files that import packages that are only installed with ddev setup-drupal. Since devs don't have to manually copy the starterkit files, I moved the types and util files into starterkit/drupal as well and excluded that directory in the tsconfig.json. (It means that to check types on starter files, you have to run the setup and then check types, but you have to copy them anyway to see if they work.)

Do we still want to use the CMS-specific subdirectories if the files are only added as part of the setup? Right now, for example, the utility files get copied to /util rather than /util/drupal.