⚗️ feat(oos): experimental s3 wrapper for OOS

[jfbus]

Description

This PR adds an experimental wrapper above the S3 API, with all the OOS supported calls.

An alternative implementation would be to use an interface with all supported methods and return the standard S3 client.

Returning a wrapping struct allows easier integration in octl and allows (potentially) to redefine inputs with only the supported fields or do additional validation.

The PR also updates the template in order to add a //sdk:group comment to methods to allow grouping of commands in octl.

Note: //tool: comments are directive comments and do not appear in the godoc documentation.

Type of Change

Please check the relevant option(s):

• 🐛 Bug fix
• ✨ New feature
• 🧹 Code cleanup or refactor
• 📝 Documentation update
• 🔧 Build or CI-related change
• 🔒 Security fix
• Other (specify):

How Has This Been Tested?

Please describe the test strategy:

• Manual testing
• Unit tests
• Integration tests
• Not tested yet

Checklist

• I have followed the Contributing Guidelines
• I have added tests or explained why they are not needed
• I have updated relevant documentation (README, examples, etc.)
• My changes follow the Conventional Commits specification
• My commits include appropriate Gitmoji

Additional Context