feat: detect title and description of document

[farnabaz]

Types of changes

• Bug fix (a non-breaking change which fixes an issue)
• New feature (a non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Description

This PR detects title and description, update the document and remove found elements after

title and description can be selected if

• document starts with title followed by block-quote

# title

> description

• document starts with block-quote

> description

resolves #93

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes (if not applicable, please state why)

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[atinux]

Could you update the Markdown files inside docs/content/ to use this feature @farnabaz ?

[farnabaz]

Sure

[farnabaz]

Updated