Karim camara/payment integration

[KarimJC]

This is what I got so far - I just need to finish testing, implement payment intents in registrations and create webhooks.

Description

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Please include a summary of the changes and the related issue. Please also
include relevant motivation, context, and images!

How Has This Been Tested?

Please describe the tests that you manually ran to verify your changes (beyond any unit/integration tests written and ran).

Screenshots

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Checklist

General

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas

Backend Changes (if applicable)

• I have written unit tests for my code
• I have written integration tests where appropriate
• New and existing unit tests pass locally with my changes
• I have run make api-validate and make api-gen to keep the openAPI spec up to date
• I have tested error handling and edge cases
• Database migrations are included (if applicable)

Frontend Changes (if applicable)

• I have tested in multiple browsers (Chrome, Firefox, Safari)
• Mobile responsive design verified (if applicable)
• I have run make generate-api to keep the API hooks up to date
• For mobile features: Tested on both iOS and Android devices
• For mobile features: Screenshots from both iOS and Android included below
• No console errors or warnings
• Loading states and error states handled

Mobile Screenshots (if applicable)

iOS

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Android

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[adescoteaux1]

remove these temp files pls!

supabase/.temp/cli-latest
supabase/.branches/_current_branch

[adescoteaux1]

do we need to store any of this card info or can it be pulled from stripe?