Integrate Volar (#340)

- Volar handles the mapping between TypeScript and LSP.
- Volar handles the mapping between TypeScript and Monaco editor.
- Volar manages virtual files.
- Volar imports TypeScript directly. As a result, the Monaco editor integration now requires `path` to be polyfilled.
- `@mdx-js/monaco` is deprecated and removed.
- This adds `remark-frontmatter` with TOML and YAML support as well as `remark-gfm` by default unless specified otherwise in `tsconfig.json`.
- The language server now requires `typescript.tsdk` to be passed via initialization options.
- This adds support for debugging virtual documents using Volar labs.

Closes #168
Closes #284
Closes #295
Closes #298
Closes #301

Co-authored-by: Christian Murphy <christian.murphy.42@gmail.com>
Co-authored-by: Johnson Chu <johnsoncodehk@gmail.com>

.changeset/get-language-module.md

@@ -0,0 +1,6 @@
+---
+'@mdx-js/language-service': minor
+---
+
+Add function `getLanguageModule`.
+This function returns a [Volar](https://volarjs.dev) language module,

.changeset/language-server.md

@@ -0,0 +1,6 @@
+---
+'@mdx-js/language-server': minor---
+'vscode-mdx': minor
+---
+
+The language server and Visual Studio Code extension are now based on [Volar](https://volarjs.dev).

.changeset/monaco.md

@@ -0,0 +1,6 @@
+---
+'@mdx-js/monaco': minor
+---
+
+Remove `@mdx-js/monaco`.
+Use [`@volar/monaco`](https://github.com/volarjs/volar.js/tree/master/packages/monaco) and `@mdx-js/language-service` instead.

.changeset/pretty-files-sell.md

@@ -0,0 +1,5 @@
+---
+'@mdx-js/language-service': minor
+---
+
+Remove `createMdxLanguageService`.

.gitattributes

@@ -0,0 +1,2 @@
+* text eol=lf
+*.png binary diff=image

.github/workflows/main.yml

@@ -13,15 +13,11 @@ jobs:
         with:
           node-version: ${{matrix.node}}
       - run: npm install
-      - run: npx playwright install --with-deps
       - run: npm test
     strategy:
       matrix:
         os:
           - ubuntu-latest
-          # We should test on Windows, because the language server deals with
-          # the file system.
-          # Currently blocked by https://github.com/remcohaszing/playwright-monaco/issues/1
-          # - windows-latest
+          - windows-latest
         node:
           - 18

README.md

@@ -14,7 +14,6 @@ It contains the following workspaces:
     can handle MDX files.
 *   [`@mdx-js/language-server`][] provides MDX IntelliSense using the
     [Language Server Protocol][].
-*   [`@mdx-js/monaco`][] provides MDX IntelliSense for [Monaco editor][].
 *   [`vscode-mdx`][] provides MDX IntelliSense and basic language support for
     [Visual Studio Code][].
 
@@ -92,8 +91,6 @@ See [§ Sponsor][sponsor] on our site for how to help financially.
 
 [MIT][] © [JounQin][]@[1stG.me][]
 
-[`@mdx-js/monaco`]: https://github.com/mdx-js/mdx-analyzer/tree/main/packages/monaco
-
 [`@mdx-js/language-server`]: https://github.com/mdx-js/mdx-analyzer/tree/main/packages/language-server
 
 [`@mdx-js/language-service`]: https://github.com/mdx-js/mdx-analyzer/tree/main/packages/language-service
@@ -108,8 +105,6 @@ See [§ Sponsor][sponsor] on our site for how to help financially.
 
 [mdx]: https://github.com/mdx-js/mdx
 
-[monaco editor]: https://microsoft.github.io/monaco-editor/
-
 [mit]: http://opensource.org/licenses/MIT
 
 [sponsor]: https://mdxjs.com/community/sponsor/