Feature/slash commands

[hetunandu]

Description

Introducing slash commands, the quicker and simpler way to let users bind their widgets to a datasource. Commands can be triggered by typing "/" and it should work anywhere outside a dynamic binding. Following are the commands supported in the initial cut.

• Command to bind to an existing action
• Command to create a new API
• Commands to create new query in an existing datasource

Fixes #4540

Type of change

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

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[rishabhsaxena]

@akash-codemonk couple of points for the associated entities and the slash commands. Let's check if they're easy to fix.
@pranavkanade please have a look at the conflicts when you get a chance

Slash commands:

• Mouse clicks don’t execute commands, enter key works
• Table data renders [object object] if we directly click on slash menu, similar for chart data

Screen.Recording.2021-07-01.at.4.42.16.PM.mov

Associated entities at the property pane:

• Associated entities don’t get reset if binding is removed
• Icons not visible in non highlighted state

[pranavkanade]

#5558 was used to merge these changes