Fix gulp files not belonging to any project

This moves the gulp files into the top level tsconfig project. However this also revealed that they were not being type checked and contain main errors, so I've also disabled `checkJs` for now

build/jsconfig.json

@@ -1,15 +0,0 @@
-{
-	"compilerOptions": {
-		"module": "commonjs",
-		"target": "es2017",
-		"jsx": "preserve",
-		"checkJs": true
-	},
-	"include": [
-		"**/*.js"
-	],
-	"exclude": [
-		"node_modules",
-		"**/node_modules/*"
-	]
-}

build/tsconfig.build.json

@@ -2,6 +2,10 @@
 	"extends": "./tsconfig.json",
 	"compilerOptions": {
 		"allowJs": false,
-		"checkJs": false
-	}
-}
+		"checkJs": false,
+		"noEmit": false
+	},
+	"include": [
+		"**/*.ts"
+	]
+}

build/tsconfig.json

@@ -12,16 +12,17 @@
 		// use the tsconfig.build.json for compiling which disable JavaScript
 		// type checking so that JavaScript file are not transpiled
 		"allowJs": true,
-		"checkJs": true,
 		"strict": true,
 		"exactOptionalPropertyTypes": false,
 		"useUnknownInCatchVariables": false,
 		"noUnusedLocals": true,
 		"noUnusedParameters": true,
-		"newLine": "lf"
+		"newLine": "lf",
+		"noEmit": true
 	},
 	"include": [
-		"**/*.ts"
+		"**/*.ts",
+		"**/*.js"
 	],
 	"exclude": [
 		"node_modules/**"