Next.js Supabase V3 (#463)

Version 3 of the kit:
- Radix UI replaced with Base UI (using the Shadcn UI patterns)
- next-intl replaces react-i18next
- enhanceAction deprecated; usage moved to next-safe-action
- main layout now wrapped with [locale] path segment
- Teams only mode
- Layout updates
- Zod v4
- Next.js 16.2
- Typescript 6
- All other dependencies updated
- Removed deprecated Edge CSRF
- Dynamic Github Action runner

docs/troubleshooting/troubleshooting-license.mdoc

@@ -0,0 +1,60 @@
+---
+status: "published"
+title: 'Troubleshooting license issues in the Next.js Supabase kit'
+label: 'License'
+order: 6
+description: 'Troubleshoot issues related to license in the Next.js Supabase SaaS kit'
+---
+
+## Email from GitHub not received
+
+If you haven't received the GitHub invitation email after purchasing a Makerkit license, this is almost always due to GitHub's email delivery behavior.
+
+### Understanding GitHub's Email Behavior
+
+**Important:** GitHub sends repository invitations to your **primary email address** associated with your GitHub account, not the email you used for your Makerkit purchase or payment or where the invitation was sent.
+
+### How to Find Your GitHub Primary Email
+
+1. Go to [GitHub Email Settings](https://github.com/settings/emails)
+2. Look for the email marked as "Primary"
+3. Check the inbox of that primary email address for the Makerkit repository invitation
+
+### Common Scenarios
+
+#### Scenario 1: Different Email for Purchase vs. GitHub
+
+If you purchased Makerkit with `work@company.com` but your GitHub primary email is `personal@gmail.com`, the invitation will be sent to `personal@gmail.com`.
+
+#### Scenario 2: Multiple GitHub Email Addresses
+
+If you have multiple email addresses in your GitHub account but only one is set as "Primary", only that primary email will receive the invitation.
+
+### Steps to Resolve
+
+1. **Check Your GitHub Primary Email**
+   - Visit [GitHub Email Settings](https://github.com/settings/emails) and make sure your primary email is set correctly
+   - Check the inbox (including spam/junk folders) of your primary email address
+2. **Change Your Primary Email (if needed)**
+   - If you want invitations sent to a different email:
+     - Add the desired email to your GitHub account if not already added
+     - Verify the email address
+     - Set it as your primary email
+     - Contact Makerkit support to resend the invitation
+3. **Check Spam/Junk Folders**
+   - GitHub invitation emails sometimes end up in spam
+   - Search for emails from `notifications@github.com`
+4. **Check GitHub Organizations**
+   - Visit [GitHub Notifications](https://github.com/settings/organizations)
+   - Organizations may also appear there
+
+### Still Can't Find the Invitation?
+
+If you've checked your primary email and still haven't received the invitation:
+
+1. Contact Makerkit support with:
+   - Your GitHub username
+   - Your GitHub primary email address
+   - Confirmation that you've checked spam folders
+
+Support will resend the invitation to ensure you receive it.