Add new param `app-name` to filter environments by application

• Add a new param to filter the environments by application name on the Shipyard App. (param can be passed either as argument or environment variable)

  Parameter Name	Description
  app-name	Filter the environments by name of the application on the Shipyard app.

  Env Var Name	Description
  SHIPYARD_APP_NAME	Filter the environments by name of the application on the Shipyard app.

• Add ID of ephemeral environment to exported environment variables as SHIPYARD_ENVIRONMENT_ID

Release 1.0.0 - fetch-shipyard-env action

Added new action fetch-shipyard-env to fetch ephemeral environments URL and bypass token.

On a successful run, the following environment variables are set, which can then be passed on to other actions in the same workflow.

Parameter Name	Description
SHIPYARD_ENVIRONMENT_URL	URL of the ephemeral environment
SHIPYARD_BYPASS_TOKEN	Token to bypass authentication