feat(align-deps): export catalogs

[tido64]

Description

Added command for exporting catalogs.

Partially resolves #3221

Test plan

1. Build and export catalogs:

   yarn build-scope @rnx-kit/align-deps
   node packages/align-deps/lib/cli.js --export-catalogs .yarnrc.yml

2. Modify test-app to consume catalogs:

   diff --git a/packages/test-app/package.json b/packages/test-app/package.json
   index 794bc85ea..50be928ac 100644
   --- a/packages/test-app/package.json
   +++ b/packages/test-app/package.json
   @@ -38,8 +38,8 @@
      },
      "dependencies": {
        "@react-native-webapis/web-storage": "workspace:*",
   -    "react": "19.1.0",
   -    "react-native": "^0.81.0"
   +    "react": "catalog:0.81",
   +    "react-native": "catalog:0.81"
      },
      "devDependencies": {
        "@babel/core": "^7.20.0",

3. Verify yarn install works and that yarn.lock does not contain new packages