Added 2 simple actions to Stac

[antonioacademy10]

Description

2 new base action parser have been added:

• multi_action_parser
  ---- action parser for executing multiple subsequential actions
• delay_action_parser
  ---- simple action parser for delay (as useful as none action)

Type of Change

• [x ] New feature (non-breaking change which adds functionality)

[CLAassistant]

All committers have signed the CLA.

[divyanshub024]

Hey @antonioacademy10 👋🏻
Thanks a lot for this PR. I'm just curious to know where this will be useful.

[antonioacademy10]

Hi @divyanshub024, thanks for question, in my scenario multiple actions needs to be fired upon a single button tap. In order to avoid to create this logics as a single function for each scenario, for me it would be better to create the fundamental blocks for the most atomic functions and to call them all together via sdui.

Regarding the delay action instead, it does nothing but wait so it's not as useful as it should be, but during develoent processes a delay function is always appreciate.

[divyanshub024]

Got it. Can you please add an example in stac_gallery and docs in website.

[antonioacademy10]

Sure, will do it later on during the day

[antonioacademy10]

Added some doc for both MultiAction and DelayAction on Website