Add list of included software on `ubuntu-slim`

[mikeharder]

Description

Please share a list of included software for ubuntu-slim, similar to https://github.com/actions/runner-images/blob/main/images/ubuntu/Ubuntu2404-Readme.md.

Platforms affected

• Azure DevOps
• GitHub Actions - Standard Runners
• GitHub Actions - Larger Runners

Runner images affected

• Ubuntu 22.04
• Ubuntu 24.04
• Ubuntu Slim
• macOS 13
• macOS 13 Arm64
• macOS 14
• macOS 14 Arm64
• macOS 15
• macOS 15 Arm64
• macOS 26 Arm64
• Windows Server 2019
• Windows Server 2022
• Windows Server 2025

Image version and build link

N/A

Is it regression?

No

Expected behavior

Documentation of included software for ubuntu-slim

Actual behavior

No documentation

Repro steps

Browse to https://github.com/actions/runner-images/blob/main/README.md. There is no mention of ubuntu-slim

[Alexey-Ayupov]

Hello @mikeharder,

Thank you for your interest in the ubuntu-slim image. Currently, we do not have packer templates for ubuntu-slim in this repository, and therefore do not maintain a software list for this image. However, we appreciate your request and will take a closer look to see what information we might be able to provide in the future.

Thank you for bringing this to our attention!