feat: cleaning up newer posts using old shortcode

also adding markdown-it-attrs to add attrs to various markdown elements!

package-lock.json

@@ -23,6 +23,7 @@
         "markdown-it": "^14.0.0",
         "markdown-it-abbr": "^2.0.0",
         "markdown-it-anchor": "^8.6.7",
+        "markdown-it-attrs": "^4.3.1",
         "markdown-it-footnote": "^4.0.0",
         "markdown-it-image-figures": "^2.1.1",
         "markdown-it-prism": "^2.3.0",
@@ -2938,6 +2939,19 @@
         "markdown-it": "*"
       }
     },
+    "node_modules/markdown-it-attrs": {
+      "version": "4.3.1",
+      "resolved": "https://registry.npmjs.org/markdown-it-attrs/-/markdown-it-attrs-4.3.1.tgz",
+      "integrity": "sha512-/ko6cba+H6gdZ0DOw7BbNMZtfuJTRp9g/IrGIuz8lYc/EfnmWRpaR3CFPnNbVz0LDvF8Gf1hFGPqrQqq7De0rg==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=6"
+      },
+      "peerDependencies": {
+        "markdown-it": ">= 9.0.0"
+      }
+    },
     "node_modules/markdown-it-footnote": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/markdown-it-footnote/-/markdown-it-footnote-4.0.0.tgz",
@@ -6920,6 +6934,13 @@
       "dev": true,
       "requires": {}
     },
+    "markdown-it-attrs": {
+      "version": "4.3.1",
+      "resolved": "https://registry.npmjs.org/markdown-it-attrs/-/markdown-it-attrs-4.3.1.tgz",
+      "integrity": "sha512-/ko6cba+H6gdZ0DOw7BbNMZtfuJTRp9g/IrGIuz8lYc/EfnmWRpaR3CFPnNbVz0LDvF8Gf1hFGPqrQqq7De0rg==",
+      "dev": true,
+      "requires": {}
+    },
     "markdown-it-footnote": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/markdown-it-footnote/-/markdown-it-footnote-4.0.0.tgz",