feat: enable heading numbers and format

[HEIGE-PCloud]

• Header number
• Custom format
• Review current documentations and remove manual heading numbers
• Custom number format (?)
• Add documentation "How to enable heading numbers in DoIt"

Related #492

[vercel]

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[HEIGE-PCloud]

@wey-gu The current implementation allows you to edit the format of the heading, (For example 1.1.1.1 or 1-1-1-1) But it does not allow editing the format of the numbers (For example 1.A.a.a is impossible).

It doesn't add numbers to titles in the toc either (I think it is impossible to achieve this using Hugo).

Check out the demo here: https://do-it-git-dev-heading-pcloud.vercel.app/markdown-tests/#headers

[wey-gu]

@wey-gu The current implementation allows you to edit the format of the heading, (For example 1.1.1.1 or 1-1-1-1) But it does not allow editing the format of the numbers (For example 1.A.a.a is impossible).

It doesn't add numbers to titles in the toc either (I think it is impossible to achieve this using Hugo).

Check out the demo here: https://do-it-git-dev-heading-pcloud.vercel.app/markdown-tests/#headers

Numerical only is good enough for me ;), Thanks!!!