[bug] 5 issues occuring when building Docker images for Python+uv monorepos

**Describe the bug** While working on setting up a sample repo of a monorepo with Python+uv projects for #2489, I encountered some issues that I documented in https://github.com/lucsorel/moon-python-monorepo-docker-issues (forgive me for the long read), in which I also provide some workarounds that do not look like long-term solutions or good practices to me. For the sake of concision, I do not detail the issues here, but here are their titles: 1. `moon docker setup` requires the source code of the projects, but `moon docker scaffold` does not yield it 2. `moon docker setup` requires the `README.md` files of the projects, but `moon docker scaffold` does not yield them 3. `moon r --no-actions --quiet` still implies actions and logs in a fully-built Docker image 4. `moon docker setup` requires the source code and `README.md` files of dependent projects, but `moon docker scaffold` does not yield them 5. Docker images unnecessarily contain the virtual environments of dependent projects **Steps to reproduce and expected behaviors** See https://github.com/lucsorel/moon-python-monorepo-docker-issues/blob/main/README.md **Screenshots** Not applicable. **Environment** ``` System: OS: Linux 6.8 Ubuntu 24.04.4 LTS 24.04.4 LTS (Noble Numbat) CPU: (12) x64 13th Gen Intel(R) Core(TM) i7-1355U Memory: 6.32 GB / 15.33 GB Container: Yes Shell: 5.9 - /usr/bin/zsh Binaries: Node: 22.19.0 - /home/lsorel-giffo/.proto/tools/node/22.19.0/bin/node npm: 10.9.3 - /home/lsorel-giffo/.proto/tools/node/22.19.0/bin/npm Managers: Apt: 2.8.3 - /usr/bin/apt Cargo: 1.95.0 - /home/lsorel-giffo/.cargo/bin/cargo Utilities: 7z: 23.01 - /usr/bin/7z Make: 4.3 - /usr/bin/make GCC: 13.3.0 - /usr/bin/gcc Git: 2.43.0 - /usr/bin/git FFmpeg: 6.1.1 - /usr/bin/ffmpeg Curl: 8.5.0 - /usr/bin/curl OpenSSL: 3.0.13 - /usr/bin/openssl Virtualization: Docker: 28.4.0 - /usr/bin/docker IDEs: Nano: 7.2 - /usr/bin/nano VSCode: 1.118.1 - /usr/bin/code Languages: Bash: 5.2.21 - /usr/bin/bash Perl: 5.38.2 - /usr/bin/perl Python: 3.8.10 - /home/lsorel-giffo/.proto/shims/python Python3: 3.12.3 - /usr/bin/python3 Rust: 1.95.0 - /home/lsorel-giffo/.cargo/bin/rustc Browsers: Chromium: 147.0.7727.116 Firefox: 150.0.1 Firefox Developer Edition: 150.0.1 ```