fix(metadata): strip directory prefix when converting nested .md link to .html

[TusharThakur04]

Description

This PR reinforce the link conversion logic for nested .md files by stripping the directory prefix.

Validation

before :

Screencast.from.2026-04-14.05-00-18.webm

after :

Screencast.from.2026-04-14.04-36-15.webm

Related Issues

n/a

Check List

• I have read the Contributing Guidelines and made commit messages that follow the guideline.
• I have run node --run test and all tests passed.
• I have check code formatting with node --run format & node --run lint.
• I've covered new added functionality with unit tests if necessary.

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Project	Deployment	Actions	Updated (UTC)
api-docs-tooling	Ready	Preview	Apr 13, 2026 11:35pm

[cursor]

PR Summary

Low Risk
Low risk: small, localized change to markdown-link normalization plus added unit coverage; main risk is unintended link rewriting if some docs relied on preserving subpaths.

Overview
API doc link normalization now converts Markdown links like namespaces/foo.md to foo.html (using basename) while still preserving any #fragment.

Adds unit tests covering nested .md links and fragment preservation to prevent regressions.

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