add source code link

public/forgejo-logo-primary.svg

@@ -0,0 +1,40 @@
+<svg viewBox="0 0 256 256" xmlns="http://www.w3.org/2000/svg">
+    <metadata
+            xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+            xmlns:cc="http://creativecommons.org/ns#"
+            xmlns:dc="http://purl.org/dc/elements/1.1/"
+    >
+        <rdf:RDF>
+            <cc:Work rdf:about="https://codeberg.org/forgejo/meta/src/branch/readme/branding#logo">
+                <dc:title>Forgejo logo</dc:title>
+                <cc:creator rdf:resource="https://caesarschinas.com/"><cc:attributionName>Caesar Schinas</cc:attributionName></cc:creator>
+                <cc:license rdf:resource="http://creativecommons.org/licenses/by-sa/4.0/" />
+            </cc:Work>
+        </rdf:RDF>
+    </metadata>
+    <style type="text/css">
+        circle {
+        fill: none;
+        stroke: #000;
+        stroke-width: 15;
+        }
+        path {
+        fill: none;
+        stroke: #000;
+        stroke-width: 25;
+        }
+        .orange {
+        stroke: oklch(55.1% 0.027 264.364);
+        }
+        .red {
+        --color-primary-700: var(--color-gray-700);
+        }
+    </style>
+    <g transform="translate(28,28)">
+        <path d="M58 168 v-98 a50 50 0 0 1 50-50 h20" class="orange" />
+        <path d="M58 168 v-30 a50 50 0 0 1 50-50 h20" class="red" />
+        <circle cx="142" cy="20" r="18" class="orange" />
+        <circle cx="142" cy="88" r="18" class="red" />
+        <circle cx="58" cy="180" r="18" class="red" />
+    </g>
+</svg>