Add pre-commit hook for yaml formatting

[gab-arrobo]

No description provided.

[Copilot]

Pull request overview

Adds YAML formatting automation via pre-commit and applies consistent formatting across existing YAML configuration/workflow files.

Changes:

• Add google/yamlfmt hook to .pre-commit-config.yaml.
• Reformat existing YAML files (remove extra blank lines / normalize indentation and comment spacing).
• Normalize formatting in GitHub workflow and config YAMLs for consistency.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
nrfTest/nrfcfg.yaml	YAML formatting cleanup (whitespace/blank lines) in test NRF config.
nrfTest/nrfcfg_with_custom_webui_url.yaml	YAML formatting cleanup (whitespace/blank lines) in alternate test config.
.pre-commit-config.yaml	Adds yamlfmt hook and reformats pre-commit config structure.
.golangci.yml	Removes extra blank lines to match formatter output.
.github/workflows/stale.yml	Removes extra blank lines to match formatter output.
.github/workflows/push.yml	Removes extra blank lines to match formatter output.
.github/workflows/main.yml	Removes extra blank lines to match formatter output.
.github/dependabot.yml	Removes extra blank lines to match formatter output.

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