docs: enforce/normalize v1 format on all te2mqtt code blocks

[reubenmiller]

Proposed changes

Enforce the display of the new MQTT v1 format in all te2mqtt code blocks, as currently the 0.13.0 docs still show the legacy MQTT api when the formats= is missing on the directive.

The global default needs to be kept at legacy so it does not break the older doc implementation, or at least until the setting can be made to auto detect which version is being shown.

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Improvement (general improvements like code refactoring that doesn't explicitly fix a bug or add any new functionality)
• Documentation Update (if none of the other choices apply)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Paste Link to the issue

Checklist

• I have read the CONTRIBUTING doc
• I have signed the CLA (in all commits with git commit -s)
• I ran cargo fmt as mentioned in CODING_GUIDELINES
• I used cargo clippy as mentioned in CODING_GUIDELINES
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

Further comments

[didier-wenzek]

Approved

[github-actions]

Robot Results

✅ Passed	❌ Failed	⏭️ Skipped	Total	Pass %	⏱️ Duration
356	0	3	356	100	1h3m22.607999999s