Add ESLint configuration guidance and lint-first CI/CD workflow

[Copilot]

Adopts lint-first validation workflow from ioBroker.bambulab PR #244, where ESLint checks gate all other tests to fail fast on code quality issues.

Changes

ESLint Configuration Section (template.md)

• Official @iobroker/eslint-config setup and configuration patterns
• Package.json scripts (lint, lint:fix)
• Common issues and auto-fix guidance

CI/CD Workflow Enhancement (template.md)

• Explicit lint-first job dependency structure
• All test jobs must depend on check-and-lint completion

jobs:
  check-and-lint:
    # Uses: ioBroker/testing-action-check@v1
    
  adapter-tests:
    needs: [check-and-lint]  # Blocks on lint failures
    
  integration-tests:
    needs: [check-and-lint, adapter-tests]

Documentation

• README.md: Code Quality & Linting section
• Version: 0.5.0 → 0.5.1

Prevents wasting CI resources on tests that would fail due to linting errors. Provides faster feedback loop for developers.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• https://api.github.com/repos/DrozmotiX/ioBroker.bambulab/pulls/244
  • Triggering command: /usr/bin/curl curl -s REDACTED (http block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Implement eslint checks</issue_title>
<issue_description>Adopt changes in copilot instruction as in https://github.com/DrozmotiX/ioBroker.bambulab/actions/runs/22077999711/job/63797265592?pr=244, update readme and numb version </issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Implement eslint checks #78

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[Copilot]

Pull request overview

This pull request adds comprehensive ESLint configuration guidance and establishes a lint-first validation workflow for CI/CD pipelines. It implements best practices from ioBroker.bambulab PR #244, where ESLint checks gate all other tests to fail fast on code quality issues. The version is incremented from 0.5.0 to 0.5.1 following semantic versioning.

Changes:

• Added ESLint Configuration and Best Practices section with official @iobroker/eslint-config setup, package.json scripts, common issues/fixes, and auto-fix guidance
• Established lint-first CI/CD workflow pattern where all test jobs must depend on check-and-lint job completion
• Updated README.md with new Code Quality & Linting section highlighting the ESLint guidance and workflow dependencies

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
template.md	Added comprehensive ESLint configuration section (lines 685-736) and lint-first validation workflow guidance (lines 778-809) with concrete YAML examples
README.md	Added Code Quality & Linting section describing ESLint features and updated version reference to 0.5.1
package.json	Incremented version from 0.5.0 to 0.5.1
config/metadata.json	Updated both main version and template version to 0.5.1 (consistent with multi-component versioning system)
.github/copilot-instructions.md	Updated version reference to 0.5.1
CHANGELOG.md	Added four detailed entries documenting ESLint additions and enhancements under WORK IN PROGRESS section