Create init_args.sh for environment variable setup

[Tearran]

Add init_args.sh for initializing environment variables and system info.

Description

Issue reference: https://github.com/armbian/configng/pull/665#issuecomment-3225862673

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Walkthrough

Adds a new Bash module at tools/modules/initialize/init_args.sh that registers module metadata and exposes a public init_vars entrypoint with subcommands (show, help). _init_vars_main gathers project identity/version, sources OS info (/etc/os-release, /etc/armbian-release), determines project paths, UI strings, system details (distro, arch, kernel, hostname) and network details (default adapter, IP, subnet, gateway, DNS, internet availability). _show_vars emits shell-friendly variable assignments and OS release variables. _about_init_vars prints usage/help. The file includes a direct-execution self-test harness.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~25 minutes

Suggested labels

size/medium

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📥 Commits

Reviewing files that changed from the base of the PR and between d0a77122b1d9a0882831b0b404c155a14976e5a2 and 45d4e871b78f6e04c89de8dbd0bcf9421b780f4c.

📒 Files selected for processing (1)

• tools/modules/initialize/init_args.sh (1 hunks)

🚧 Files skipped from review as they are similar to previous changes (1)

• tools/modules/initialize/init_args.sh

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• GitHub Check: Cockpit install (noble)
• GitHub Check: Home Assistant install (bookworm)

✨ Finishing Touches

• [ ] 📝 Generate Docstrings

🧪 Generate unit tests

• [ ] Create PR with unit tests
• [ ] Post copyable unit tests in a comment
• [ ] Commit unit tests in branch Tearran-patch-5

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