feat: use external @astrojs/check (#7892)

* feat: use @astrojs/check

* fix: what happened in my rebase??

* nit: adjust with feedback

.changeset/three-onions-repeat.md

@@ -0,0 +1,5 @@
+---
+'astro': major
+---
+
+The `astro check` command now requires an external package `@astrojs/check` and an install of `typescript` in your project. This was done in order to make the main `astro` package smaller and give more flexibility to users in regard to the version of TypeScript they use.

packages/astro/package.json

@@ -117,7 +117,6 @@
  "dependencies": {
  "@astrojs/compiler": "^1.8.0",
  "@astrojs/internal-helpers": "workspace:*",
- "@astrojs/language-server": "^1.0.0",
  "@astrojs/markdown-remark": "workspace:*",
  "@astrojs/telemetry": "workspace:*",
  "@babel/core": "^7.22.5",
@@ -165,7 +164,6 @@
  "string-width": "^5.1.2",
  "strip-ansi": "^7.1.0",
  "tsconfig-resolver": "^3.0.1",
- "typescript": "*",
  "unist-util-visit": "^4.1.2",
  "vfile": "^5.3.7",
  "vite": "^4.4.6",
@@ -197,6 +195,7 @@
  "@types/send": "^0.17.1",
  "@types/server-destroy": "^1.0.1",
  "@types/unist": "^2.0.6",
+ "@astrojs/check": "^0.1.0",
  "astro-scripts": "workspace:*",
  "chai": "^4.3.7",
  "cheerio": "1.0.0-rc.12",