Add passwordless setup and sign-in

[rvzakngh]

Changes:

• Update "Get invited and onboard to TechPass" page to add Step 7 for passwordless
  • Initially wanted to have passwordless step after MFA, but as this is first-time sign-in, it is better to let the first-time sign-in process (force change password and tnc) fully completed. So add passwordless as last step
• Need iOS screenshot for one of the steps
• Log in with TechPass, restructure a bit
  • Existing separates sign-in to service and to TechPass Portal as a separate steps, but actually are the same
  • So combine and separate instead based on the authentication methods

How it looks like:

doc-passwordless-20251205.mp4