chore: Add markdown syntax support - Issue 572 (NomicFoundation#575)

* Add markdown syntax support

* chore: lint fix for package.json

---------

Co-authored-by: Michal Tomasik <michaltomasik@Michals-MacBook-Pro.local>
Co-authored-by: John Kane <john@kanej.me>

client/package.json

@@ -115,13 +115,27 @@
           ".sol"
         ],
         "configuration": "./language-configuration.json"
+      },
+      {
+        "id": "solidity-markdown-injection"
       }
     ],
     "grammars": [
       {
         "language": "solidity",
         "scopeName": "source.solidity",
         "path": "./syntaxes/solidity.json"
+      },
+      {
+        "language": "solidity-markdown-injection",
+        "scopeName": "markdown.solidity.codeblock",
+        "path": "./syntaxes/solidity-markdown-injection.json",
+        "injectTo": [
+          "text.html.markdown"
+        ],
+        "embeddedLanguages": {
+          "meta.embedded.block.solidity": "solidity"
+        }
       }
     ],
     "snippets": [

client/syntaxes/solidity-markdown-injection.json

@@ -0,0 +1,45 @@
+{
+  "fileTypes": [],
+  "injectionSelector": "L:text.html.markdown",
+  "patterns": [
+      {
+          "include": "#solidity-code-block"
+      }
+  ],
+  "repository": {
+      "solidity-code-block": {
+          "begin": "(^|\\G)(\\s*)(\\`{3,}|~{3,})\\s*(?i:(solidity)(\\s+[^`~]*)?$)",
+          "name": "markup.fenced_code.block.markdown",
+          "end": "(^|\\G)(\\2|\\s{0,3})(\\3)\\s*$",
+          "beginCaptures": {
+              "3": {
+                  "name": "punctuation.definition.markdown"
+              },
+              "4": {
+                  "name": "fenced_code.block.language.markdown"
+              },
+              "5": {
+                  "name": "fenced_code.block.language.attributes.markdown"
+              }
+          },
+          "endCaptures": {
+              "3": {
+                  "name": "punctuation.definition.markdown"
+              }
+          },
+          "patterns": [
+              {
+                  "begin": "(^|\\G)(\\s*)(.*)",
+                  "while": "(^|\\G)(?!\\s*([`~]{3,})\\s*$)",
+                  "contentName": "meta.embedded.block.solidity",
+                  "patterns": [
+                      {
+                          "include": "source.solidity"
+                      }
+                  ]
+              }
+          ]
+      }
+  },
+  "scopeName": "markdown.solidity.codeblock"
+}