feat(frontend): add [wb]itchsky.app as alternative frontends

Signed-off-by: rooot <[e-mail]>

static/index.html

···
                 msg('<span class="r">invalid link!</span>');
                 return;
             }
-            const bsky_appviews = ["bsky.app", "deer.social", "boobsky.app", "catsky.social", window.location.host];
+            const bsky_appviews = ["bsky.app", "deer.social", "boobsky.app", "catsky.social", "bitchsky.app", "witchsky.app", window.location.host];
             if (!bsky_appviews.includes(url.hostname)) {
                 msg('<span class="r">this is not a bsky.app link!</span>');
                 return;