Add new invite system

content/english/invite.md

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+---
+title: "Invite a Friend to our Chat!"
+layout: "invite"
+---

content/english/transactional/invite-fail.md

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++++
+url = "/invite-fail"
+title="Error"
+subtitle="Invite Failed"
+main_image=""
++++
+
+#### UH OH!
+
+It seems we couldn't generate the chat invite. A few reasons why:
+- Incorrect [Revolt](https://chat.handmadecities.com) username or password
+- You are not a [Verified Human](https://guide.handmadecities.com/docs/chat/#verified-human-badge) yet
+- A server error on our part. Contact our support staff immediately

content/english/transactional/invite-success.md

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++++
+url = "/invite-success"
+title="Complete"
+subtitle="Invite Successful"
+main_image=""
++++
+
+#### Congrats!
+
+If you've met in meatspace they'll get a [Verified Human](https://guide.handmadecities.com/docs/chat/#verified-human-badge) badge, which grants *them* the power of invites. Ready to [send another](/invite)? 
+
+⚠️  We use an invite tree [inspired](https://lobste.rs/about#invitations) by the Lobsters community. The **TL;DR** is YOU are responsible for the users you invite, plus any users they've invited (and so on.)