Add Gruvbox share theme + blog system for Trilium (anonymized)

Blog generator, publish manager, share scripts, theme CSS, highlight.js
bundles, font, favicon, templates and generated-reference outputs, plus an
English installation guide.

scripts/logo_share_alias.js

@@ -0,0 +1,10 @@
+<script>
+(function () {
+    var logo = document.getElementById("header-logo");
+    if (!logo) return;
+    var h = logo.getAttribute("href");
+    if (h && h.indexOf("__BLOG_ROOT_ID__") !== -1) {
+        logo.setAttribute("href", "./blog");
+    }
+})();
+</script>