Handling client-side session errors and loading

[ShmulTomer]

Handle client-side session errors and loading

Issue Number(s): #169

What does this PR change and why? PR requirements

• also I think I accidentally branched off my other issue branch so there's some remnants of that, I removed some of them but I think it should be fine once they're both merged

Checklist

• [x] Requirements have been implemented
• [x] Acceptance criteria is met
• [ ] Database schema docs have been updated or are not necessary
• [x] Relevant reviewers (EM) have been assigned to this PR

Critical Changes

• Database change / migration to run
• Environment config change
• Breaking API change

How To Test

Within SessionManager.jsx, you can manually set status to 'loading' or 'unauthenticated' and attempt to go on protected pages to see either a Loading page or getting kicked off to /login

[netlify[bot]]

❌ Deploy Preview for canine-assistants failed.

Name	Link
🔨 Latest commit
🔍 Latest deploy log	https://app.netlify.com/sites/canine-assistants/deploys/6605711790f50d070e7faf1e

[afazio1]

integrated into #236