Add Gitea icon (#310)

* Add reference image for Drone

* Add icon for Drone

* Add Drone to reference/index.md

* Update README.md

* Add Gitea SVG

* Add Gitea reference image

* Add Gitea to Readme

* Add Gitea to reference/index.md

* Fix alignment for Gitea icon

* Revert "Add reference image for Drone"

This reverts commit 5890c6c2a4.

* Revert "Add icon for Drone"

This reverts commit fafb541cf8.

* Revert reference/index.md

* Revert README.md

images/svg/gitea.svg

@@ -0,0 +1,6 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+aria-label="Gitea" role="img"
+viewBox="0 0 512 512"><rect
+width="512" height="512"
+rx="15%"
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