CI: Pre-install apt dependencies in setup action to prevent hangs

[Copilot]

The MT code sync step could hang or run very slowly because requireCommand() in commons.sh lazily invokes apt-get on demand mid-step. Pre-installing all known dependencies upfront eliminates these blocking calls.

Changes

• shared-overwrite/.github/actions/setup/action.yml: Added a new MT install apt dependencies step immediately before MT code sync that eagerly installs all required packages, with a 5-minute timeout per command, --no-install-recommends, a 5-second pause, and automatic retry on failure or timeout:

- name: MT install apt dependencies
  shell: bash
  run: |
    max_attempts=2
    for attempt in $(seq 1 ${max_attempts}); do
      echo "[MT] > Installing apt dependencies (attempt ${attempt}/${max_attempts})..."
      if timeout 300 sudo apt-get update && timeout 300 sudo apt-get install -y --no-install-recommends libxml2-utils jq inkscape imagemagick; then
        echo "[MT] > apt dependencies installed successfully."
        break
      elif [[ ${attempt} -lt ${max_attempts} ]]; then
        echo "[MT] > apt dependencies installation failed or timed out, retrying in 5 seconds..."
        sleep 5
      else
        echo "[MT] > apt dependencies installation failed after ${attempt} attempts."
        exit 1
      fi
    done

The step runs unconditionally — these packages are needed by all repos regardless of whether code-sync is enabled, so subsequent requireCommand() calls will find them already present and skip the apt-get invocation entirely. Each apt-get command is capped at 5 minutes (timeout 300), --no-install-recommends keeps the install lean, and the whole install waits 5 seconds then retries once automatically before failing the step.

[gemini-code-assist]

Code Review

This pull request introduces a retry mechanism for installing apt dependencies within the setup action. The review feedback suggests enhancing the installation command with non-interactive environment variables and Dpkg options to prevent the CI process from stalling on configuration prompts.

[mmathieum]

Tested: ✅

• Testing mtransitapps/commons#655 ca-montreal-amt-train-android#4