feat: add branch to get registry (#650)

### Description
- Add `branch` to getRegistry() to allow fetching the Registry of
different branches
- Up the sdk version to latest to allow `yarn link`

### Backward compatibility
Yes

### Testing
Tested check-deploy using `yarn link`

.changeset/red-garlics-swim.md

@@ -0,0 +1,5 @@
+---
+'@hyperlane-xyz/registry': minor
+---
+
+Add `branch` to getRegistry to allow reading of specific commit/branches. Also up the SDK version

package.json

@@ -9,7 +9,7 @@
   "devDependencies": {
     "@changesets/cli": "^2.26.2",
     "@eslint/js": "^9.1.1",
-    "@hyperlane-xyz/sdk": "7.0.0",
+    "@hyperlane-xyz/sdk": "8.8.1",
     "@types/mocha": "^10.0.1",
     "@types/node": "^16.9.1",
     "@typescript-eslint/parser": "^7.7.0",

src/registry/registry-utils.ts

@@ -22,6 +22,7 @@ const isCanonicalRepoUrl = (url: string): boolean => {
 export function getRegistry(
   registryUris: string[],
   enableProxy: boolean,
+  branch?: string,
   logger?: Logger,
 ): IRegistry {
   const registryLogger = logger?.child({ module: 'MergedRegistry' });
@@ -33,6 +34,7 @@ export function getRegistry(
       if (isHttpsUrl(uri)) {
         return new GithubRegistry({
           uri,
+          branch,
           logger: childLogger,
           proxyUrl: enableProxy && isCanonicalRepoUrl(uri) ? PROXY_DEPLOYED_URL : undefined,
         });