Replace docusaurus with 11ty (#7260)

# Pull Request

## 📖 Description

This change replaces Docusaurus, which has been causing a multitude of dependency issues, with 11ty.

## 👩‍💻 Reviewer Notes

Please review carefully, I have separated versions into 1.x and 2.x folder which should make this easier for our v3 migration.
There are a couple scripts for navigation, and the CSS has been copied over, there may be some unused CSS at present but I believe it can be cleaned up relatively easily at a later date.

This is in service of #7189

## ✅ Checklist

### General

<!--- Review the list and put an x in the boxes that apply. -->

- [ ] I have included a change request file using `$ npm run change`
- [ ] I have added tests for my changes.
- [x] I have tested my changes.
- [x] I have updated the project documentation to reflect my changes.
- [x] I have read the [CONTRIBUTING](https://github.com/microsoft/fast/blob/main/CONTRIBUTING.md) documentation and followed the [standards](https://github.com/microsoft/fast/blob/main/CODE_OF_CONDUCT.md#our-standards) for this project.

Author: janechu

build/package.json

@@ -0,0 +1,6 @@
+{
+  "name": "@microsoft/fast-build",
+  "description": "Build utilities for FAST monorepo",
+  "version": "0.0.0",
+  "private": true
+}

package-lock.json

@@ -9,8 +9,8 @@
   "license": "MIT",
   "private": true,
   "workspaces": [
+    "build",
     "packages/*",
-    "sites/site-utilities",
     "sites/website",
     "examples/todo-app",
     "examples/ssr"
@@ -63,13 +63,12 @@
     "@rollup/plugin-node-resolve": "15.2.3",
     "@rollup/plugin-terser": "0.4.4",
     "@rollup/plugin-typescript": "8.5.0",
-    "@tensile-perf/web-components": "0.2.3",
-    "@types/node": "22.18.11",
+    "@tensile-perf/web-components": "^0.2.3",
     "@types/chai": "4.3.16",
     "@types/chai-spies": "1.0.6",
     "@types/karma": "6.3.8",
     "@types/mocha": "7.0.2",
-    "@types/express": "4.17.21",
+    "@types/node": "22.18.11",
     "@types/webpack-env": "1.18.5",
     "@typescript-eslint/eslint-plugin": "5.62.0",
     "@typescript-eslint/parser": "5.62.0",
@@ -122,4 +121,4 @@
       "glob": "$glob"
     }
   }
-}
+}