README documents .claude-plugin/marketplace.json but it's missing from the repo

Following the install instructions in the README:
```
/plugin marketplace add flyteorg/skills
```
fails with:
```
Error: Marketplace file not found at .../.claude-plugin/marketplace.json
```

The README's "Layout" section documents `.claude-plugin/marketplace.json` as the marketplace catalog, but the repo only contains `LICENSE`, `README.md`, and `plugins/` at the root — there's no `.claude-plugin/` directory at the top level. Each plugin under `plugins//.claude-plugin/plugin.json` exists individually, but nothing ties them together into a marketplace catalog.

Could you add the missing `.claude-plugin/marketplace.json` listing `flyte-deploy-aws` and `flyte-deploy-kind`? Happy to send a PR if that's useful.

Start with the README's Layout and install instructions, then inspect plugins/flyte-deploy-aws/.claude-plugin/plugin.json and plugins/flyte-deploy-kind/.claude-plugin/plugin.json for the plugin metadata to include. Add the root .claude-plugin/marketplace.json catalog with both plugins, then verify that the documented /plugin marketplace add flyteorg/skills command no longer reports a missing marketplace file.

Written by the indexing model from the issue text.