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/reading_time.js

@@ -0,0 +1,18 @@
+<script>
+(function () {
+    var content = document.getElementById("content");
+    if (!content) return;
+    if (!document.body.classList.contains("type-text")) return;
+    if (content.querySelector(".blog-post") || content.querySelector(".blog-garden-table") || content.querySelector(".blog-subcategories") || content.querySelector(".blog-search")) return;
+    var clone = content.cloneNode(true);
+    clone.querySelectorAll("script, style, pre, code, nav, a, .blog-prevnext").forEach(function (el) { el.remove(); });
+    var words = (clone.textContent || "").trim().split(/\s+/).filter(Boolean).length;
+    var mins = Math.max(1, Math.round(words / 200));
+    var title = document.getElementById("title");
+    if (!title) return;
+    var p = document.createElement("div");
+    p.className = "reading-time";
+    p.textContent = mins + " min read";
+    title.parentNode.insertBefore(p, title.nextSibling);
+})();
+</script>