docs: add Podman as alternative container runtime

[RomuDeuxfois]

Summary

Add Podman as a documented alternative to Docker across installation and development guides. Podman is a drop-in, daemonless, rootless replacement for Docker that avoids Docker Desktop licensing constraints.

Context

The existing documentation exclusively references Docker/Docker Desktop for container management. Users and contributors who prefer or require Podman (e.g., due to licensing, security, or organizational policies) had no guidance. This PR adds Podman as a first-class alternative throughout the docs.

Changes

docs/deployment/installation.md

• Added an informational callout introducing Podman as a Docker alternative
• Converted Linux and Windows/MacOS prerequisites into tabbed sections (Docker vs. Podman) so users can pick their runtime
• Added a Podman-specific tip in the "Run OpenAEV" section

docs/development/environment-ubuntu.md

• Converted the Docker Engine prerequisite into tabbed sections (Docker Engine vs. Podman)
• Added Podman install instructions and a compatibility note

docs/development/build-from-source.md

• Added a Podman compatibility tip in the "Required dependencies" section, clarifying that podman compose is a drop-in replacement for docker compose

Notes

• All existing Docker instructions remain unchanged — Podman is presented as an alternative, not a replacement
• Linux users can continue using Docker CLI/Engine (no licensing issue)
• The docker-compose.yml files are fully compatible with Podman