Description

Update signup page to show people how to sign up for an email/password or Bitbucket account
Move all content on creating a project to the create a project page and just link to it to avoid duplication
Improved copy around how to know which options to use depending on integration type, as during signup no integration has happened yet so it no longer made sense how it was
Place the Create a project page after the Join your teammates page in the sidebar to make the flow of how to get started clearer
Cleaned up a fe bits of the Join your teammates page
Updates some screenshots but am holding off adding more until the new branding goes live

Reasons

The signup flow has changed

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Please take a moment to check through the following items when submitting your PR (this is just a guide so will not be relevant for all PRs) 😸:

[ ] Break up walls of text by adding paragraph breaks.
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