misc: add .well-known

For now it stores my funding manifest URL. If you want to add one too,
open a PR.

Signed-off-by: Yuxuan Shui <[email protected]>

Author: yshui

.github/workflows/page.yml

@@ -32,6 +32,8 @@ jobs:
           asciidoctor -a doctype=article -a stylesheet=../assets/next.css -b html man/picom-trans.1.adoc -D _site
           cp -r assets _site/
           cp _site/picom.1.html _site/index.html
+      - name: Copy .well-known
+        run: cp -r .well-known _site
 
       - name: Upload
         uses: actions/upload-pages-artifact@v3

.well-known/funding-manifest-urls

@@ -0,0 +1 @@
+https://yshui.github.io/funding.json