Add a public homepage so visitors can tell what Hesychia is.

Logged-out / is the marketing site. Signed-in / still opens chat.
Closes #113, #114, #115, and #116.

Co-authored-by: Cursor <cursoragent@cursor.com>

llm-fe/public/llms.txt

@@ -0,0 +1,18 @@
+# Hesychia
+
+> Hesychia is a calm AI assistant. Quiet, focused AI chat — private by default.
+
+Hesychia is a $10/month AI chat product from AI ML Operations, LLC. It stores your documents so answers can use your files, and company managers can manage team accounts. Conversation memory is a setting you control. Canceling a subscription does not delete documents. Account deletion is a soft-delete.
+
+## Pages
+
+- [Home](https://hesychia.ai/): what Hesychia is, who it is for, and how to start
+- [Pricing](https://hesychia.ai/pricing/): $10/month, flat, no ads, no upsells
+- [Privacy](https://hesychia.ai/privacy/): what is stored, what is not sold, what cancel does to documents
+- [Changelog](https://hesychia.ai/changelog/): dated product updates
+- [Terms of Service](https://hesychia.ai/terms_of_service/): the binding terms
+- [Account deletion](https://hesychia.ai/account-deletion/): how to delete an account and what soft-delete keeps
+
+## Operator
+
+AI ML Operations, LLC — https://www.aimloperations.com