feat: implement high-quality cross-platform miner installer script

[BuilderFred]

Motivation

To lower the barrier to entry for new miners, this PR adds a robust, cross-platform installer script (install.sh) that automates environment setup and persistence.

Features

• Auto-Detection: Identifies OS (Ubuntu, Debian, Fedora, macOS) and architecture.
• Sandbox Environment: Sets up a Python virtual environment to avoid system pollution.
• Persistence: Automatically configures systemd (Linux) or launchd (macOS) to ensure the miner starts on boot and restarts on failure.
• User Friendly: Supports interactive wallet setup or command-line flags.
• Clean Removal: Includes an --uninstall flag for easy cleanup.

Fixes Scottcjn/rustchain-bounties#4.

[Scottcjn]

@BuilderFred A few things:

1. This overwrites samuel-asleep's installer that merged to main 30 minutes ago (PR Add production-ready one-command miner installer with virtualenv isol… #6). Completely replacing another contributor's merged work isn't great practice — especially when the previous PR went through multiple review rounds.

2. If your installer is genuinely better, consider one of these approaches:

   • Add it as a separate file (install-v2.sh or install-advanced.sh) rather than replacing install.sh
   • Or identify specific improvements and submit them as incremental patches to the existing installer

3. Technical question: Your version uses git clone of the entire repo, while samuel-asleep's downloads individual miner files. The git clone approach means the user gets 100+ MB of repo instead of just the miner script. That's a tradeoff worth discussing.

4. Testing: Has this been tested with an actual miner attestation to https://50.28.86.131? The bounty requires on-chain verification — the miner installed by your script must successfully attest.

Not rejecting this — but it needs a clear case for why it should replace rather than complement the existing installer. What does yours do that the current one doesn't?

[Scottcjn]

Update: We're accepting both installer approaches. The more options for new miners, the better. Reviewing for merge now.

@samuel-asleep Your original installer is valued — this is an alternative approach, not a replacement of your contribution. Both earned their bounties.

[Scottcjn]

Quick review notes (non-blocking — merging to keep momentum):

Issues to fix in a follow-up:

1. read -p won't work in curl | bash piped context — needs read -p ... < /dev/tty (same bug samuel-asleep fixed in PR Add production-ready one-command miner installer with virtualenv isol… #6)
2. Line 124 logic bug: command -v git >/dev/null 2>&1 || sudo apt-get update && sudo apt-get install -y git — the && chains wrong without braces
3. Drops PowerPC support — samuel-asleep's version had PPC G4/G5/POWER8 platform detection and per-platform miner downloads. This one only handles Linux + macOS.
4. --wallet flag parsing on lines 205-208 checks $2 twice redundantly

Good additions:

• --uninstall flag
• venv isolation
• systemd + launchd auto-start
• Cleaner structure

These can be fixed in a follow-up commit. Merging now.

[Scottcjn]

@BuilderFred This PR has a merge conflict with the current install.sh on main (from PR #6).

Two options:

1. Rebase on main and resolve the conflict: git fetch origin && git rebase origin/main
2. Rename your installer to install-alt.sh or install-v2.sh so both versions coexist

Either way works — just push the fix and we'll merge.

[Scottcjn]

@BuilderFred — This PR has a merge conflict with main (samuel-asleep's installer merged as PR #6).

Can you rebase on main? Two options:

1. Rebase and rename to install-v2.sh so both installers coexist
2. Rebase and keep install.sh — but you'll need to resolve the conflict with the existing file

Option 1 is cleaner since samuel-asleep's installer is already live. Your version has nice additions (venv setup, systemd/launchd persistence, uninstall flag) that complement the existing one.

Also heads up on two bugs from the earlier review:

• read -p won't work when piped via curl | bash (stdin is the script)
• Line 124: command -v git >/dev/null 2>&1 || sudo apt-get update && sudo apt-get install -y git — needs grouping with { } or the && chains unconditionally

Let me know if you need help with the rebase.