Privacy center customisations

[seanpreston]

Closes https://github.com/ethyca/fde/issues/12

Description Of Changes

This PR adds the ability to customise more of the privacy centre:

• The title of the consent button is not separate from the modalTitle, which is the title that's displayed in the modal
• confirmButtonText adds an override to the Continue buttons in the modals
• cancelButtonText adds an override to the Cancel buttons in the modals
• The email and phone identity_inputs are now able to both be optional, as the privacy center will fallback to the anonymous ID
• The favicon_path can now be changed to display a hosted favicon

The changes are made to be as backwards compatible as possible, to avoid the need for further config version translation logic.

Steps to Confirm

• cd clients/privacy-center
• turbo run dev
• Update the above options and observe they display text correctly
• Remove the above options entirely and ensure they return to their defaults

Pre-Merge Checklist

• All CI Pipelines Succeeded
• Documentation:
  • documentation complete, PR opened in fidesdocs
  • documentation issue created in fidesdocs
• Issue Requirements are Met
• Relevant Follow-Up Issues Created
• Update CHANGELOG.md
• For API changes, the Postman collection has been updated

[cypress]

Passing run #2502 ↗︎

0	4	0	0	0
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Details:

Merge 5414893 into d638d66...
Project: fides	Commit: f9044d3782 ℹ️
Status: Passed	Duration: 01:04 💡
Started: Jun 7, 2023 12:54 AM	Ended: Jun 7, 2023 12:55 AM

_{This comment has been generated by cypress-bot as a result of this project's GitHub integration settings.}

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (d638d66) 87.12% compared to head (5414893) 87.12%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3432   +/-   ##
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  Coverage   87.12%   87.12%           
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  Files         312      312           
  Lines       18757    18757           
  Branches     2389     2389           
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  Hits        16342    16342           
  Misses       1991     1991           
  Partials      424      424           

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[ThomasLaPiana]

@seanpreston I don't feel dangerous enough on the frontend to approve this, but nice work! 😅 🚀

[TheAndrewJackson]

Looks great! Just one small nit left with the modal query param logic