[FEATURE] Add New Functions to Formbricks Pixel

[jonas-hoebenreich]

Is your feature request related to a problem? Please describe.

I would like to suggest to add the following two functions to the formbricks pixel (wording tbd):

• formbricks.isInitialized() returns true if Formbricks is initialized, false otherwise (e.g. before formbricks.init() call or after formbricks.logout())
• formbricks.inCooldown() returns true if the user already saw a survey and is in recontact waiting time phase (the user might still be able to see surveys that ignore the recontact waiting time) and false otherwise

Describe the solution you'd like

Add those functions to js-core

Describe alternatives you've considered

Directly check formbricks-js in local storage (but this is cumbersome and not future proof).

Additional context

No response