docs: use directives instead of gh-specific syntax

[GauBen]

Description

Yay!

This will replace this weird text:

With a nice warning box

Checklist

Source code

• I've shared and documented any breaking change
• I've reviewed and updated the jahia-depends

Tests

• I've provided Unit and/or Integration Tests
• I've updated the parent issue with required manual validations

Tip

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[Copilot]

Pull Request Overview

This PR updates documentation files to use generic markdown directives instead of GitHub-specific callout syntax, improving compatibility across different documentation platforms.

• Replaces GitHub-specific > [!WARNING], > [!TIP], and > [!IMPORTANT] syntax with standard :::warning, :::info, and :::warning directives
• Adds a name field to the GitHub workflow file
• Updates documentation formatting to ensure consistent rendering across platforms

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
docs/1-getting-started/2-making-a-hero-section/README.md	Converts GitHub callouts to standard directives for warning and info blocks
docs/1-getting-started/1-dev-environment/README.md	Replaces GitHub important callout with warning directive
.github/workflows/push-docs.yml	Adds workflow name header

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