feat: make email address log in validation case insensitive

[AikoPath]

Problem

Email addresses for user accounts are treated case sensitive. This means that email@example.com will create a different user account than Email@example.com.

Solution

• Treat all email address input as lowercased on sign in (front end & backend)

Closes TOOL-119

[vercel[bot]]

@AikoPath is attempting to deploy a commit to the OGP Tooling Team Team on Vercel.

A member of the Team first needs to authorize it.

[karrui]

Closes TOOL-119