Implement DNS module (#1691)

* Boilerplate for DNS stuff

* Add c-ares

* lookup

* make

* Implement dns.lookup

* Create c-ares

* wip

* normalize

* repro

* Revert "repro"

This reverts commit 8b93e0c295b335b8882a9601da47720348549beb.

* Implement macOS `getaddrinfo_async_start`

* embiggen

* Update string_immutable.zig

* Update Makefile

* alright

* Update .gitignore

* Add types

* more ccache

* Update Dockerfile

* Update Dockerfile

* Update Dockerfile

* Update bun.d.ts

Co-authored-by: Jarred Sumner <709451+Jarred-Sumner@users.noreply.github.com>

src/string_immutable.zig

@@ -3974,6 +3974,14 @@ pub fn isIPAddress(input: []const u8) bool {
     }
 }
 
+pub fn isIPV6Address(input: []const u8) bool {
+    if (std.net.Address.parseIp6(input, 0)) |_| {
+        return true;
+    } else |_| {
+        return false;
+    }
+}
+
 pub fn cloneNormalizingSeparators(
     allocator: std.mem.Allocator,
     input: []const u8,