chore: align `Headers` to spec (#10199)

This commit aligns `Headers` to spec. It also removes the now unused
03_dom_iterable.js file. We now pass all relevant `Headers` WPT. We do
not implement any sort of header filtering, as we are a server side
runtime.

This is likely not the most efficient implementation of `Headers` yet.
It is however spec compliant. Once all the APIs in the `HTTP` hot loop
are correct we can start optimizing them. It is likely that this commit
reduces bench throughput temporarily.

1 files changed, 21 insertions, 4 deletions

diff --git a/op_crates/web/internal.d.ts b/op_crates/web/internal.d.ts
index 5681edc7b..a5b653218 100644
--- a/op_crates/web/internal.d.ts
+++ b/op_crates/web/internal.d.ts
@@ -17,15 +17,32 @@ declare namespace globalThis {
         result: string;
         position: number;
       };
+      ASCII_DIGIT: string[];
+      ASCII_UPPER_ALPHA: string[];
+      ASCII_LOWER_ALPHA: string[];
+      ASCII_ALPHA: string[];
+      ASCII_ALPHANUMERIC: string[];
+      HTTP_TAB_OR_SPACE: string[];
+      HTTP_WHITESPACE: string[];
+      HTTP_TOKEN_CODE_POINT: string[];
+      HTTP_TOKEN_CODE_POINT_RE: RegExp;
+      HTTP_QUOTED_STRING_TOKEN_POINT: string[];
+      HTTP_QUOTED_STRING_TOKEN_POINT_RE: RegExp;
+      HTTP_WHITESPACE_PREFIX_RE: RegExp;
+      HTTP_WHITESPACE_SUFFIX_RE: RegExp;
+      regexMatcher(chars: string[]): string;
+      byteUpperCase(s: string): string;
+      byteLowerCase(s: string): string;
     };
 
-    declare var mimesniff: {
-      parseMimeType(input: string): {
+    declare namespace mimesniff {
+      declare interface MimeType {
         type: string;
         subtype: string;
         parameters: Map<string, string>;
-      } | null;
-    };
+      }
+      declare function parseMimeType(input: string): MimeType | null;
+    }
 
     declare var eventTarget: {
       EventTarget: typeof EventTarget;