Add Shiki as an alternative to Prism (#2497)

* [ci] yarn format

* Added shiki to markdown-remark

* Upgraded astro shiki

* Added minimal example

* Changed defaults to match <Code />

* Replace `shiki` with `astro` classes

* Added documentation

* Updated Astro code to use new `codeToHtml`

* Added changesets

* Added basic test

* Updated tests a bit

Co-authored-by: JuanM04 <JuanM04@users.noreply.github.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/examples/with-markdown-shiki/src/pages/index.md b/examples/with-markdown-shiki/src/pages/index.md
new file mode 100644
index 000000000..89e58184f
--- /dev/null
+++ b/examples/with-markdown-shiki/src/pages/index.md
@@ -0,0 +1,14 @@
+---
+title: Shiki demo
+layout: ../layouts/main.astro
+---
+
+# Shiki demo
+
+```js
+var foo = 'bar';
+
+function doSomething() {
+  return foo;
+}
+```