fix: pass preset parserOpts and writerOpts to conventional-changelog

[sarahdayan]

Summary

Fixes changelog entries missing version links and having <small> tags around patch versions.

Problem

Changelog entries for patch releases looked like:

## <small>0.28.1 (2026-02-05)</small>

Instead of the expected format with a compare link:

## [0.28.1](https://github.com/algolia/shipjs/compare/v0.28.0...v0.28.1) (2026-02-05)

This also caused GitHub releases to have empty bodies since extractSpecificChangelog couldn't match the <small> format.

Root Cause

The angular preset's parserOpts and writerOpts (which include the header template with links) weren't being passed to conventional-changelog-core:

// Before
conventionalChangelogCore(
  args,
  templateContext,
  gitRawCommitsOpts,
  undefined,  // parserOpts not passed
  undefined,  // writerOpts not passed
  execOpts
)

This caused conventional-changelog-writer to fall back to its default header template which wraps patch versions in <small> tags and omits links.

Solution

Extract and pass the preset's parserOpts and writerOpts:

const { parserOpts, writerOpts } = args.config || {};
conventionalChangelogCore(
  args,
  templateContext,
  gitRawCommitsOpts,
  parserOpts,
  writerOpts,
  execOpts
)