add feature: vs code intellisense to devicon.json (#1487)

* Add VS Code Intellisense to `devicon.json`

VS Code Intellisense provides these features:
- A snippet to create a new input object by typing `new`
- Validates
    - `name` structure
    - `color` structure
    - `version.svg[]`, `version.font[]`, `aliases.?base` and `aliases.?alias` completion
- Provides some description for the properties based on the documentation

* Fix name pattern and add `dot-net` exception

* Update .vscode/devicon-schema.json

Co-authored-by: Jørgen Kalsnes Hagen <43886029+Snailedlt@users.noreply.github.com>

* Update .vscode/devicon.code-snippets

Great!

Co-authored-by: Jørgen Kalsnes Hagen <43886029+Snailedlt@users.noreply.github.com>

* Update .vscode/devicon-schema.json

Agreed! It's more detailed now!

Co-authored-by: Jørgen Kalsnes Hagen <43886029+Snailedlt@users.noreply.github.com>

* Update .vscode/devicon-schema.json

Great!

Co-authored-by: Jørgen Kalsnes Hagen <43886029+Snailedlt@users.noreply.github.com>

Co-authored-by: Jørgen Kalsnes Hagen <43886029+Snailedlt@users.noreply.github.com>

.vscode/devicon.code-snippets

@@ -0,0 +1,24 @@
+{
+  "new entry": {
+    "scope": "json",
+    "prefix": "new",
+    "description": "Inserts the new entry template object. Use it ONLY in \"devicon.json\"!",
+    "body": [
+      "{",
+      "    \"name\": \"\",",
+      "    \"altnames\": [],",
+      "    \"tags\": [],",
+      "    \"versions\": {",
+      "       \"svg\": [",
+      "           \"\"",
+      "       ],",
+      "       \"font\": [",
+      "           \"\"",
+      "       ]",
+      "    },",
+      "    \"color\": \"\",",
+      "    \"aliases\": []",
+      "},"
+    ]
+  }
+}