Fix and test for bug #1457 (#1481)

* Fix and test for bug #1457 (Uncaught SyntaxError: Regular expression too large)

 - see test case which is extracted from a real world css file; the selector regex was able to traverse the curly brace as when looking for quotes, it wasn't taking into account that the start quote could be escaped

* Apply formatting changes

* Create fair-ducks-clean.md

* Fix @import regex bit which was stopping consumption in the middle of a url - need to consume quotes.

Thanks dave.kindel@pendo.io for reporting and isolating this case

---------

Co-authored-by: eoghanmurray <eoghanmurray@users.noreply.github.com>

packages/rrweb-snapshot/src/css.ts

@@ -433,7 +433,7 @@ export function parse(css: string, options: ParserOptions = {}): Stylesheet {
     }
 
     // Use match logic from https://github.com/NxtChg/pieces/blob/3eb39c8287a97632e9347a24f333d52d916bc816/js/css_parser/css_parse.js#L46C1-L47C1
-    const m = match(/^(("(?:\\"|[^"])*"|'(?:\\'|[^'])*'|[^{])+)/);
+    const m = match(/^(((?<!\\)"(?:\\"|[^"])*"|(?<!\\)'(?:\\'|[^'])*'|[^{])+)/);
     if (!m) {
       return;
     }
@@ -864,7 +864,17 @@ export function parse(css: string, options: ParserOptions = {}): Stylesheet {
    */
 
   function _compileAtrule(name: string) {
-    const re = new RegExp('^@' + name + '\\s*([^;]+);');
+    const re = new RegExp(
+      '^@' +
+        name +
+        '\\s*((?:' +
+        [
+          '(?<!\\\\)"(?:\\\\"|[^"])*"',
+          "(?<!\\\\)'(?:\\\\'|[^'])*'",
+          '[^;]',
+        ].join('|') +
+        ')+);',
+    );
     return () => {
       const pos = position();
       const m = match(re);