Fix wrong absolute link in doc generated markdown

[glazec]

Motivation

#8576 This issue found a link problem in forge doc generated website. Some link uses the wrong absolute link like /contracts/foo which is an invalid URL.

Solution

There are two parts using the wrong absolute link

• inheritance part
• summary page link for folders( if the contract is inside a subfolder of contract src page, like contracts/consensus/authority/

For the inheritance page, we changed how the inheritance contract is processed and stored the relevant path( like docs/src/contracts/portals/IERC20Portal.sol/interface.IERC20Portal.md). We assemble the final link in the as_doc where inheritance is processed. We concatenate the link (like /Users/glaze/developer/foundry/rollups-contracts/docs/docs/src/contracts/inputs/IInputBox.sol/interface.IInputBox.md) and clean it up and output the correct link (like file:///Users/glaze/developer/foundry/rollups-contracts/docs/book/contracts/portals/IPortal.sol/interface.IPortal.html.)

[guidanoli]

@glazec why did you close the PR?

[glazec]

There are some bugs in the PR. I am working on that