Move editorconfig and prettierrc files to project root

.editorconfig

@@ -0,0 +1,11 @@
+# Generated by editorconfig.timseverien.com
+# https://editor.timseverien.com/#config
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_style = tab
+insert_final_newline = true
+tab_width = 4
+trim_trailing_whitespace = true

.prettierrc.json

@@ -0,0 +1,12 @@
+{
+	"tabs": true,
+	"tabWidth": 4,
+	"overrides": [
+		{
+			"files": "*.html",
+			"options": {
+				"tabWidth": 2
+			}
+		}
+	]
+}