Add project layout, move scripts to /opt/zero2dash, update systemd units, and add framebuffer test script

[aSbiEL0]

Motivation

• Provide a sane on-device layout and deployable location for the Pi-hole TFT dashboard and simplify installation steps.
• Add a lightweight local test utility to validate framebuffer rendering without the full Pi-hole integration.

Description

• Added a suggested project structure to README.md and updated install steps to install python3-pil, copy files to /opt/zero2dash, and adjust service deployment commands to use /opt/zero2dash.
• Moved existing scripts into a scripts/ directory and updated the WorkingDirectory and ExecStart/ExecStartPre paths in systemd/pihole-display.service and systemd/pihole-display-dark.service to point at /opt/zero2dash and /opt/zero2dash/scripts.
• Added scripts/test_placeholder.py, a small utility that renders a centered "TEST" image, converts RGB888 to RGB565, and can either write to a framebuffer device or save a preview image via --output and skip framebuffer writes with --no-framebuffer.
• Ensured the README documents the placeholder test command and the updated configuration path for piholestats_v1.2.py under /opt/zero2dash/scripts.

Testing

• No automated tests were present or executed for these changes.

---

Codex Task

[aSbiEL0]

PS C:\zero2dash> git pull origin main
From https://github.com/aSbiEL0/zero2dash

• branch main -> FETCH_HEAD
  Already up to date.
  PS C:\zero2dash> git checkout codex/create-placeholder-test-script
  branch 'codex/create-placeholder-test-script' set up to track 'origin/codex/create-placeholder-test-script'.
  Switched to a new branch 'codex/create-placeholder-test-script'
  PS C:\zero2dash> git merge main
  Committer identity unknown

*** Please tell me who you are.

Run

git config --global user.email "you@example.com"
git config --global user.name "Your Name"

to set your account's default identity.
Omit --global to set the identity only in this repository.

fatal: unable to auto-detect email address (got 'Default@Maciek-PC.(none)')
PS C:\zero2dash> git config --global user.email "asbiel0@gmail.com"
PS C:\zero2dash> git merge main
Auto-merging README.md
CONFLICT (content): Merge conflict in README.md
Auto-merging systemd/display.service
CONFLICT (content): Merge conflict in systemd/display.service
Automatic merge failed; fix conflicts and then commit the result.
PS C:\zero2dash>

[aSbiEL0]

@codex[agent] please fix the issues and create a new pull request

[Codex]

@aSbiEL0 I've opened a new pull request, #3, to work on those changes. Once the pull request is ready, I'll request review from you.

[chatgpt-codex-connector]

Summary

• Added compatibility systemd unit files systemd/display.service and systemd/display-dark.service so environments still referencing the legacy display*.service names can run with the new /opt/zero2dash and /opt/zero2dash/scripts paths. systemd/display.serviceL1-L21 systemd/display-dark.serviceL1-L21
• Updated README.md to include the compatibility unit files in the project structure and to deploy all service units (systemd/*.service) during installation. README.mdL24-L31 README.mdL89-L96
• Documented the compatibility intent explicitly in the README so users understand why both pihole-display*.service and display*.service exist. README.mdL138-L140
• Committed the follow-up changes on branch work (67b8a33) and created a new PR via the make_pr tool with a title/body describing these fixes.

Testing

• ✅ python3 -m py_compile scripts/test_placeholder.py scripts/piholestats_v1.1.py scripts/piholestats_v1.2.py
• ⚠️ curl -s https://api.github.com/repos/aSbiEL0/zero2dash/contents/systemd | head -c 800 (used for upstream context check; returned 404 Not Found because the repository path is not publicly accessible from this environment)

View task →

[aSbiEL0]

@codex[agent] recheck the code

[Codex]

@aSbiEL0 I've opened a new pull request, #7, to work on those changes. Once the pull request is ready, I'll request review from you.