Dev Ops: Create composer.json that pulls in km-collaborative

[mariacha]

• [x] Start by modeling after the composer workflow available in 8.8. I followed these instructions: https://www.drupal.org/docs/develop/using-composer/using-composer-to-install-drupal-and-manage-dependencies by running composer create-project --prefer-dist --no-install drupal/recommended-project my_site_name_dir

Note that that only added three files: the composer.json file, the .editorconfig file, and the .gitattributes file. I suspect we could move the last two out of the root with some cleverness...

• [x] Add a .gitignore
• [x] Create composer.json that pulls in km-collaborative.
• [x] Ran into this problem where you can't re-run composer install. Added the $settings['skip_permissions_hardening'] = TRUE; value to my settings.local.php file. If we're deploying to Pantheon via circle, interesting to see what will need to happen with that. Circle can maintain that setting, but Pantheon needs to have the files be locked. Might be able to overwrite that specific file as well?
• [x] Update the README below the "Delete me" line to be relevant to what we actually do. This will involve figuring this out.
• [x] Start moving pieces out of this repo and into km-collaborative.
• [x] Test: Do commit your composer.lock file on child sites but not on the km-collaborative site.
• [x] We might not actually need this at all, given how little it differs from the drupal project https://github.com/drupal/recommended-project
• [x] Review additional steps in https://github.com/thinkshout/project-framework/wiki/Project-Setup and add them to this repo's readme.
• [x] Add better links for the Requirements section of the readme.
• [x] Improve the link quality when referencing the example drops repo.
• [x] Mention the obliterate command

Documentation improvements

• [x] How to confirm you can write to a repo in the README.
• [x] How to gain access if you don't have it for the things. Figure this out.
• [x] Terminus how to tell if you have it. Check the version: terminus --version. Add help if it's at a lower version.
• [x] build tools, how to tell if you have it terminus build:project:create -h and say to use 2.x
• [x] Format of character limit -- need to be a url-safe string
• [x] Possibly give some help text about what the first time you'll need: Circle api, Github API, Site password.
• [x] Add instructions for how to debug if composer install fails.
• [x] ~Add a link in the README for how to develop your local site.~ Made this its own issue #7

Figure out why the new start project fails

• [x] There's a composer conflict between the drops and drupal. Me to investigate that.

This ticket is done when

• [x] A dev can follow the instructions in the README to set up a testing project on Pantheon deployed via circle.
• [x] The README for this new custom project does not contain the information in this starter kit readme.