Revert changes to the docs build (#1226)

Undoes #1222 and
891bf3e to get the documentation site to build.

I am still unsure why does it sometime fail due to a missing
`models.json` file. Perhaps it skips the `build:json` part of the
process somehow? Let's keep observing the subsequent builds.

package.json

@@ -5,7 +5,7 @@
 	"scripts": {
 		"build": "nx run-many --all --target=build",
 		"build:website": "nx build playground-website",
-		"build:docs": "nx build-docs docs-site",
+		"build:docs": "nx build docs-site",
 		"deploy:docs": "gh-pages -d dist/docs/build -t true",
 		"dev": "nx dev playground-website",
 		"format": "nx format",

packages/docs/site/project.json

@@ -9,16 +9,7 @@
 		"playground-client"
 	],
 	"targets": {
-		"build:json": {
-			"executor": "nx:run-commands",
-			"options": {
-				"commands": [
-					"npx typedoc --plugin typedoc-plugin-mdn-links --plugin typedoc-plugin-resolve-crossmodule-references --json packages/docs/site/src/model.json"
-				],
-				"parallel": false
-			}
-		},
-		"build-docs": {
+		"build": {
 			"executor": "nx:run-commands",
 			"options": {
 				"commands": [
@@ -28,13 +19,15 @@
 			},
 			"dependsOn": ["build:json"]
 		},
-		"build": {
+		"build:json": {
 			"executor": "nx:run-commands",
 			"options": {
-				"commands": ["docusaurus build"],
-				"cwd": "packages/docs/site"
-			},
-			"dependsOn": ["build-docs"]
+				"commands": [
+					"npx typedoc --plugin typedoc-plugin-mdn-links --plugin typedoc-plugin-resolve-crossmodule-references --json packages/docs/site/src/model.json",
+					"echo Built `pwd`/packages/docs/site/src/model.json file"
+				],
+				"parallel": false
+			}
 		},
 		"swizzle": {
 			"executor": "nx:run-commands",