Add parser experiment working with API surface.

.gitignore

@@ -1 +1 @@
-experiments
+/experiments

docs/experiments/package.json

@@ -0,0 +1,6 @@
+{
+  "type": "module",
+  "dependencies": {
+    "@terrace/core": "0.0.1"
+  }
+}

docs/experiments/parser.js

@@ -0,0 +1,19 @@
+import { createLineData, useDocument } from '@terrace/core'
+import { createStringReader } from '@terrace/core/readers/js-string'
+
+async function main() {
+  const lines = [
+    `title Example`,
+    `subsection`,
+    ` position 1`,
+    ` Ea dolore in aliquip fugiat anim adipisicing amet aute tempor et deserunt est duis sint.`,
+    `subsection 2`,
+    ` position 2`,
+    ` Aute deserunt incididunt ad in sint adipisicing est officia velit pariatur ipsum deserunt quis nulla.`
+  ]
+
+  const rootDoc = useDocument(createStringReader(lines))
+  console.log(await rootDoc.seek('subsection').then(r => r.content()))
+}
+
+main()