README: coffee button at the top and in Support

README.md

@@ -1,5 +1,7 @@
 # archify-vscode-ext
 
+[![Buy me a coffee](https://cdn.buymeacoffee.com/buttons/v2/default-yellow.png)](https://buymeacoffee.com/root.at.skic)
+
 Agent Skill for Archify diagrams and models as read by the [Archify Diagram Viewer](https://marketplace.visualstudio.com/items?itemName=root-at-skic.archify-vscode-ext) VS Code extension: how to write `.archify` diagrams (architecture, workflow, sequence, dataflow, lifecycle), how to put them together as a model (`main.archify`, shared elements in `*.archify-registry` files, `ref:` components, `diagram:` links, C4-style folders), and tasks that validate, list, scaffold, resolve and render them. The Archify validator and renderer (MIT, by tt-a1i) are bundled under `scripts/vendor`, so nothing else needs to be installed.
 
 ## Install and update
@@ -36,4 +38,6 @@ Requires Node.js 18+, bash and [go-task](https://taskfile.dev). The skill target
 
 ## Support
 
-If this saves you time, you can buy me a coffee: https://buymeacoffee.com/root.at.skic
+If this saves you time, a coffee keeps it going:
+
+[![Buy me a coffee](https://cdn.buymeacoffee.com/buttons/v2/default-yellow.png)](https://buymeacoffee.com/root.at.skic)