docs: stop describing verdande as "Todoist Pro"

Claiming to be Todoist Pro is both inaccurate and an invitation to a
trademark complaint. Describe verdande on its own terms — a fast,
self-hosted task manager — and keep the Todoist references to what they
factually are: import/export interop, and a filter grammar close enough
that people coming from there already know it.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

README.md

@@ -24,9 +24,10 @@ Documentation: [`docs/`](docs/), built with Material for MkDocs.
 
 ## Why this exists
 
-Todoist Pro, self-hosted, on your own hardware, with your own data — and with the
-integrations that a hosted product will not build for you: a real CalDAV server, a
-mail-to-task address, and an MCP endpoint so Claude can work your task list directly.
+A fast, self-hosted task manager — projects, quick add, filters, notes and shared
+lists — on your own hardware, with your own data, and with the integrations that a
+hosted product will not build for you: a real CalDAV server, a mail-to-task address,
+and an MCP endpoint so Claude can work your task list directly.
 
 ## What it does
 

docs/filters.md

@@ -1,7 +1,8 @@
 # Saved filters
 
 A filter is a small expression describing a slice of your tasks. The grammar is
-Todoist's, so if you are coming from there you already know it.
+deliberately close to the one Todoist uses, so if you are coming from there you
+already know it.
 
 ```
 today & p1

docs/index.md

@@ -11,7 +11,8 @@ of. Which is what a to-do list is.
 
 ## What it is for
 
-Todoist Pro, on your own hardware, with your own data. And with the integrations a
+A fast, self-hosted task manager — projects, quick add, filters, notes and shared
+lists — on your own hardware, with your own data. And with the integrations a
 hosted product will not build for you: a real CalDAV server, an address you can
 forward mail to, and an MCP endpoint so Claude can work your task list directly.