Parse inner JSX as Astro (#67)

* Parse inner JSX as Astro

This completes the compiler changes, updating the parser so that it parses inner "JSX" as Astro. It does this by finding the start and end of HTML tags and feeds that back into the parser.

The result is a structure like this:

```
{
  type: 'MustacheTag',
  expression: [
    {
      type: 'Expression',
      codeStart: 'colors.map(color => (',
      codeEnd: '}}'
      children: [ {
        type: 'Fragment',
        children: [ {
          type: 'Element',
          name: 'div'
        } ]
      } ]
    }
  ]
}
```

There is a new Node type, `Expression`.  Note that `MustacheTag` remains in the tree, all it contains is an Expression though. I could spend some time trying to remove it, there's just a few places that expect it to exist.

* Update import to the transform

* Transform prism components into expressions

1 files changed, 4 insertions, 4 deletions

diff --git a/src/compiler/index.ts b/src/compiler/index.ts
index d33527b9b..db50abec8 100644
--- a/src/compiler/index.ts
+++ b/src/compiler/index.ts
@@ -11,7 +11,7 @@ import { parse } from '../parser/index.js';
 import { createMarkdownHeadersCollector } from './markdown/micromark-collect-headers.js';
 import { encodeMarkdown } from './markdown/micromark-encode.js';
 import { encodeAstroMdx } from './markdown/micromark-mdx-astro.js';
-import { optimize } from './optimize/index.js';
+import { transform } from './transform/index.js';
 import { codegen } from './codegen.js';
 
 /** Return Astro internal import URL */
@@ -29,7 +29,7 @@ interface ConvertAstroOptions {
  * .astro -> .jsx
  * Core function processing .astro files. Initiates all 3 phases of compilation:
  * 1. Parse
- * 2. Optimize
+ * 2. Transform
  * 3. Codegen
  */
 async function convertAstroToJsx(template: string, opts: ConvertAstroOptions): Promise<TransformResult> {
@@ -40,8 +40,8 @@ async function convertAstroToJsx(template: string, opts: ConvertAstroOptions): P
     filename,
   });
 
-  // 2. Optimize the AST
-  await optimize(ast, opts);
+  // 2. Transform the AST
+  await transform(ast, opts);
 
   // 3. Turn AST into JSX
   return await codegen(ast, opts);