Signup: Add more messages on the processing screen

[arthur791004]

Proposed Changes

• Add more messages on the processing screen

signup-processing-screen.mov

Testing Instructions

• Go to /start
• Finish the singup flow
• You will see following messages on the processing screen
  • Turning on the lights
  • Making you cookies
  • Planning the next chess move

Related to #65024 (comment)

[github-actions]

Calypso Live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-36646

Jetpack Cloud live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-36646&env=jetpack

[matticbot]

Here is how your PR affects size of JS and CSS bundles shipped to the user's browser:

Sections (~29 bytes added 📈 [gzipped])

name    parsed_size           gzip_size
signup        +74 B  (+0.0%)      +29 B  (+0.0%)

Sections contain code specific for a given set of routes. Is downloaded and parsed only when a particular route is navigated to.

Legend

What is parsed and gzip size?

Parsed Size: Uncompressed size of the JS and CSS files. This much code needs to be parsed and stored in memory.
Gzip Size: Compressed size of the JS and CSS files. This much data needs to be downloaded over network.

Generated by performance advisor bot at iscalypsofastyet.com.

[a8ci18n]

This Pull Request is now available for translation here: https://translate.wordpress.com/deliverables/7407350

Hi @arthur791004, could you please edit the description of this PR and add a screenshot for our translators? Ideally it'd include all of the following strings:

• Building your site
• Laying the foundations
• Turning on the lights
• Making it beautiful
• Sprinkling some magic
• Preparing your domain
• Making you cookies
• Planning the next chess move

Thank you in advance!

[taipeicoder]

LGTM, let's wait for the translation before merging 🙂

[a8ci18n]

Translation for this Pull Request has now been finished.