Please add support to installation on other linux distros

[FabianoLothor]

Currently it is not possible to install on alpine:latest due required dependencies used on base-install.sh that the distros are not able to know there are missing dependencies.

You can reproduce the issue with:

# PowerShell
docker run --rm -it `
  -v ${PWD}/agent-os:/tmp `
  -w /tmp `
  alpine:latest `
  sh -c 'apk add bash curl && curl -sSL https://raw.githubusercontent.com/buildermethods/agent-os/main/scripts/base-install.sh | bash && ls ~/agent-os'

My suggestions are:

1. Check dependencies, let the distros handle them automatically letting them know about it
2. Do not start installation until all dependencies are satisfied
3. Move the installation to a proper package-manager like they made on bmad (using npm), open-spec (using npm) and spec-kit (using uv).