feat: implement Windows file path handling

Author: mertcanaltin

lib/url-state-machine.js

@@ -577,8 +577,7 @@ URLStateMachine.prototype["parse scheme"] = function parseScheme(c, cStr) {
     this.buffer += cStr.toLowerCase();
   } else if (c === p(":")) {
     // Windows drive letter
-    if (!this.stateOverride &&
-        this.buffer.length === 1 && infra.isASCIIAlpha(this.buffer.codePointAt(0)) &&
+    if (this.buffer.length === 1 && infra.isASCIIAlpha(this.buffer.codePointAt(0)) &&
         this.input[this.pointer + 1] === p("\\")) {
       this.url.scheme = "file";
       this.url.host = "";