Adopt ESLint --max-warnings 0 instructions from ioBroker.esphome

[Copilot]

• Update template.md ESLint lint script to use eslint --max-warnings 0 .
• Update ESLint Best Practices item 1 to emphasize fixing ALL warnings, not just errors
• Add Best Practices item 6 noting CI treats warnings as errors (--max-warnings 0)
• Bump version to 0.5.7
• Update CHANGELOG.md with proper ## [0.5.7] - 2026-02-21 version tag
• Run tests and verify all pass

Original prompt

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This section details on the original issue you should resolve

<issue_title>Adopt ESLint instructions</issue_title>
<issue_description>Adopt changes in instructions from: https://github.com/DrozmotiX/ioBroker.esphome/pull/407/changes#diff-227c2c26cb2ee0ce0f46a320fc48fbcbdf21801a57f59161b1d0861e8aad55f5</issue_description>

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

• Fixes Adopt ESLint instructions #95

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✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[DutchmanNL]

@copilot you forgot the version tag

[Copilot]

Added the ## [0.5.7] - 2026-02-21 version tag in commit 51a166b.

[Copilot]

Pull request overview

This PR updates the template’s ESLint guidance to align with CI behavior that enforces --max-warnings 0 (treat warnings as errors), and bumps the template version accordingly.

Changes:

• Update the template’s recommended lint script to eslint --max-warnings 0 . and clarify best practices to fix warnings (not just errors).
• Bump version references from 0.5.6 → 0.5.7 across template/docs/metadata.
• Add WORK IN PROGRESS changelog entries describing the ESLint guidance change.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
template.md	Updates ESLint script example and best-practices wording to enforce --max-warnings 0.
CHANGELOG.md	Adds WIP entries describing the ESLint guidance update.
package.json	Bumps repository version to 0.5.7.
config/metadata.json	Syncs metadata/template version to 0.5.7.
README.md	Updates documented template version snippet to 0.5.7.
.github/copilot-instructions.md	Bumps instructions file version to 0.5.7.

[Copilot]

The changelog entry references “Fixes #94”, but the PR metadata indicates this change should fix #95. Please update the issue reference so the changelog links to the correct issue.

[Copilot]

This WORK IN PROGRESS entry doesn’t follow the documented changelog format (it’s missing a “(Fixes #XX)” reference), and it suggests running the eslint binary directly even though the template guidance now says to use npm run lint to match CI. Consider updating this line to match the template wording and include the issue reference.

Suggested change

	- (copilot) **ENHANCED**: Added best practice to run `./node_modules/.bin/eslint --max-warnings 0 .` locally to match CI behavior
	- (copilot) **ENHANCED**: Added best practice to run `npm run lint` locally to match CI behavior (Fixes #95)