Add Markdown capability globally (#1965)

* add markdown capability globally

* add markdown to site description

* add showdown to package.json

remove it from vendor.json, its bundled

* formatting

* io

* Update lnbits/core/templates/core/index.html

---------

Co-authored-by: dni ⚡ <office@dnilabs.com>

package-lock.json

@@ -11,6 +11,7 @@
         "chart.js": "2.9",
         "moment": "^2.29.4",
         "quasar": "1.13.2",
+        "showdown": "^2.1.0",
         "underscore": "^1.13.6",
         "vue": "2.6.12",
         "vue-i18n": "^8.28.2",
@@ -1059,6 +1060,29 @@
       "integrity": "sha512-KiKBS8AnWGEyLzofFfmvKwpdPzqiy16LvQfK3yv/fVH7Bj13/wl3JSR1J+rfgRE9q7xUJK4qvgS8raSOeLUehw==",
       "license": "ISC"
     },
+    "node_modules/showdown": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/showdown/-/showdown-2.1.0.tgz",
+      "integrity": "sha512-/6NVYu4U819R2pUIk79n67SYgJHWCce0a5xTP979WbNp0FL9MN1I1QK662IDU1b6JzKTvmhgI7T7JYIxBi3kMQ==",
+      "dependencies": {
+        "commander": "^9.0.0"
+      },
+      "bin": {
+        "showdown": "bin/showdown.js"
+      },
+      "funding": {
+        "type": "individual",
+        "url": "https://www.paypal.me/tiviesantos"
+      }
+    },
+    "node_modules/showdown/node_modules/commander": {
+      "version": "9.5.0",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-9.5.0.tgz",
+      "integrity": "sha512-KRs7WVDKg86PWiuAqhDrAQnTXZKraVcCc6vFdL14qrZ/DcWwuRo7VoiYXalXO7S5GKpqYiVEwCbgFDfxNHKJBQ==",
+      "engines": {
+        "node": "^12.20.0 || >=14"
+      }
+    },
     "node_modules/simport": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/simport/-/simport-1.2.0.tgz",