feat(markdoc): Support markdown-it's typographer option

[schpet]

Changes

this allows people to use markdown-it's typographer option:

// https://astro.build/config
export default defineConfig({
  integrations: [markdoc({ typographer: true })],
});

the typographer option converts regular quotes to curly quotes. it's mentioned in the markdown-it readme.

Testing

a test was added to packages/integrations/markdoc/test/render.test.js confirming that regular quotes were replaced with the fancy variety.

Docs

it could use an additional section in the markdoc docs:
https://docs.astro.build/en/guides/integrations-guide/markdoc/#integration-config-options

/cc @withastro/maintainers-docs let me know if i should make a PR to add docs for this option to https://github.com/withastro/docs

Try it out

it took me a minute to figure out how to run my fork, but with these changes to the package.json i was able to run and deploy it:

{
  "dependencies": {
    "@astrojs/markdoc": "https://github.com/schpet/astro/releases/download/markdoc-typographer%400.1/astrojs-markdoc-0.11.1.tgz",
  },
  "pnpm": {
    "overrides": {
      "@astrojs/internal-helpers": "npm:@astrojs/internal-helpers",
      "@astrojs/markdown-remark": "npm:@astrojs/markdown-remark",
      "@astrojs/prism": "npm:@astrojs/prism"
    }
  }
}

[changeset-bot]

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[bholmesdev]

“good job”