Merge pull request #4 from pantheon-systems/php8.2-support

Remove drupal-console tests.

Add GHA and test on 8.2.

Update to Terminus 2; test with Circle 2 (#3)

Convert Circle badge style to 'shield'.

Simplify testing.

Update installation instructions link.

Move testing instructions to CONTRIBUTING.md.

Add tests

Fix installation instructions.

Add -- to examples in README for clarity.

Fix org in composer.json: should be 'pantheon-systems' instead of 'pantheon'.

PSR-4 autoload directive in composer.json must end with a trailing-backslash.

Fix composer create-project example in README.

Call Drupal Console directly via pantheonssh.