feat(links): added ofm option to style unresolved or broken links differently (#1992)

* feat: add option to disable broken wikilinks

* fix(style): update hover color for broken links and introduce new class

* feat: add "disableBrokenWikilinks" option to ObsidianFlavoredMarkdown

quartz/styles/base.scss

@@ -91,7 +91,7 @@ a {
   color: var(--secondary);
 
   &:hover {
-    color: var(--tertiary) !important;
+    color: var(--tertiary);
   }
 
   &.internal {
@@ -101,6 +101,15 @@ a {
     border-radius: 5px;
     line-height: 1.4rem;
 
+    &.broken {
+      color: var(--secondary);
+      opacity: 0.5;
+      transition: opacity 0.2s ease;
+      &:hover {
+        opacity: 0.8;
+      }
+    }
+
     &:has(> img) {
       background-color: transparent;
       border-radius: 0;