[FEATURE] Adds .djinrc

[catks]

.djinrc will be loaded before any build command or task command, also some environment must be provisioned to enable executing specific tasks in each scenario, eg:

#!/bin/bash

case $DJIN_COMMAND_TYPE in
  build)
    # Some code here ...
    ;;

  task)
    # Some code here ...
    ;;
esac

With this some workarounds can be dropped, eg:

release:
    local:
      run:
        - (source ~/.zshrc || true)
        - verto tag up {{args}}
        - bundle exec rake release

[catks]

Also DJIN_TASK_TYPE

#!/bin/bash

case $DJIN_TASK_TYPE in
  local)
    # Some code here ...
    ;;

  docker)
    # Some code here ...
    ;;

  docker-compose)
    # Some code here ...
    ;;
esac

[catks]

If #28 is implemented DJIN_COMMAND_TYPE can be removed and the .djinrc can be loaded only once.