Add firebase mage target

• Add firebase functionality with core-mage target.
• Some improvements to documentation too.

v0.10.1

• Upgrade CockroachDB to v20.1.0

v0.9.0

• Provide new targets for development dev:start, dev:stop, dev:restart, dev:reset, dev:run
• Provide new targets for testing tests:start, tests:stop, tests:restart, tests:reset, tests:run
• Running mage test and mage dev:run now runs docker-compose run app rather than docker-compose up app
• Removed specific setup commands, all setup happens on mage setup
• Improved env package to allow loading env files from project root during testing
• mage protos:update now also automatically generates the protos after updating
• Fix bug with functions wrongly exposed as targets

v0.8.0

• Restructure of the infra/ directory and the environment variable files
• Automatic migration of legacy environment files to the new structure
• Opening of different ports of the development dependencies
• Added files to .gitignore
• Update of package dependencies
• Provide env package for loading mage generated environment files

v0.7.0

• Provide targets for installing or upgrading common dependencies
• Provide documentation for infra/ directory