initial sketch of symbols upfront interlinks.

docs/make.jl

@@ -145,7 +145,7 @@ links = InterLinks(
 makedocs(;
     format=Documenter.HTML(;
         prettyurls=run_on_CI || ("--prettyurls" ∈ ARGS),
-        assets=["assets/favicon.ico", "assets/citations.css"],
+        assets=["assets/favicon.ico", "assets/citations.css", "assets/link-icons.css"],
         size_threshold_warn=200 * 2^10, # raise slightly from 100 to 200 KiB
         size_threshold=300 * 2^10,      # raise slightly 200 to to 300 KiB
     ),

docs/src/assets/link-icons.css

@@ -0,0 +1,42 @@
+a[href^="https://juliamanifolds.github.io/ManifoldsBase.jl/"]::before {
+    content: "";
+    background-image: url('logo-manifoldsbase.png');
+    background-size: contain;
+    background-repeat: no-repeat;
+    display: inline-block;
+    height: 1em;
+    width: 1em;
+    margin-right: 4px;
+    vertical-align: middle;
+}
+a[href^="https://juliamanifolds.github.io/Manifolds.jl/"]::before {
+    content: "";
+    background-image: url('logo-manifolds.png');
+    background-size: contain;
+    background-repeat: no-repeat;
+    display: inline-block;
+    height: 1em;
+    width: 1em;
+    margin-right: 4px;
+    vertical-align: middle;
+}
+a[href^="https://en.wikipedia.org/"]::before {
+    content: "";
+    background-image: url('wikipedia.png');
+    background-size: contain;
+    background-repeat: no-repeat;
+    display: inline-block;
+    height: 1em;
+    width: 1em;
+    margin-right: 4px;
+    vertical-align: middle;
+}
+
+@media (prefers-color-scheme: dark) {
+    a[href^="https://juliamanifolds.github.io/ManifoldsBase.jl/"]::before {
+        background-image: url('logo-manifoldsbase-dark.png');
+    }
+    a[href^="https://juliamanifolds.github.io/Manifolds.jl/"]::before {
+        background-image: url('logo-manifolds-dark.png');
+    }
+}