feat(vscode): support for highlighning robot code in markdown code blocks

use the at defining the language in a codeblock you can use `robot` or `robotframework` as specifier

Example:

~~~
```robot
*** Settings ***
Library  Browser

*** Variables ***
${BROWSER}  Chrome

*** Test Cases ***
Open Browser
    New Page  http://www.google.com
    Click   name=q
    Evaluate  ${{(a+' asd'+ b + 2)[1:3]}}
```
~~~

Author: d-biehl

package.json

@@ -81,6 +81,7 @@
   ],
   "main": "./out/extension.js",
   "contributes": {
+    "markdown.markdownItPlugins": true,
     "icons": {
       "robotcode-robot": {
         "description": "RobotFramework Icon",
@@ -344,6 +345,9 @@
           ".resource"
         ],
         "configuration": "./language-configuration.json"
+      },
+      {
+        "id": "robotframework-injection"
       }
     ],
     "grammars": [
@@ -359,6 +363,17 @@
           "comment.robotframework",
           "comment"
         ]
+      },
+      {
+        "language": "robotframework-injection",
+        "scopeName": "markdown.robotframework.codeblock",
+        "path": "./syntaxes/codeblock_robotframework.tmLanguage.json",
+        "injectTo": [
+          "text.html.markdown"
+        ],
+        "embeddedLanguages": {
+          "meta.embedded.block.robotframework": "robotframework"
+        }
       }
     ],
     "keybindings": [
@@ -948,6 +963,12 @@
         "command": "robotcode.keywordsTreeView.showDocumentation",
         "enablement": "resourceLangId == robotframework && view == robotcode.keywordsTreeView",
         "icon": "$(book)"
+      },
+      {
+        "title": "Create New File",
+        "shortTitle": "Robot Framework File",
+        "category": "RobotCode",
+        "command": "robotcode.createNewFile"
       }
     ],
     "menus": {
@@ -997,6 +1018,13 @@
           "command": "robotcode.keywordsTreeView.showDocumentation",
           "when": "view == robotcode.keywordsTreeView"
         }
+      ],
+      "file/newFile": [
+        {
+          "command": "robotcode.createNewFile",
+          "group": "file",
+          "when": "!virtualWorkspace"
+        }
       ]
     },
     "breakpoints": [

syntaxes/codeblock_robotframework.tmLanguage.json

@@ -0,0 +1,45 @@
+{
+  "fileTypes": [],
+  "injectionSelector": "L:text.html.markdown",
+  "patterns": [
+    {
+      "include": "#robotframework-code-block"
+    }
+  ],
+  "repository": {
+    "robotframework-code-block": {
+      "begin": "(^|\\G)(\\s*)(\\`{3,}|~{3,})\\s*(?i:(robot|robotframework)(\\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.robotframework",
+          "patterns": [
+            {
+              "include": "source.robotframework"
+            }
+          ]
+        }
+      ]
+    }
+  },
+  "scopeName": "markdown.robotframework.codeblock"
+}

syntaxes/robotframework.tmLanguage.json

@@ -2405,5 +2405,6 @@
 	"uuid": "a7fae509-bc8d-451e-b5fc-a47feb9d2a9e",
 	"fileTypes": [ "robotframework" ],
 	"name": "Robot Framework",
-	"scopeName": "source.robotframework"
+	"scopeName": "source.robotframework",
+	"displayName": "Robot Framework"
 }