fix: handle empty list items and nested objects in list items (#65)

* fix: support quoted keys with array syntax

Fixes parsing of quoted keys followed by array syntax like:
"x-codeSamples"[1]{lang,label,source}:

Previously, parseArrayHeaderLine would skip any line starting with
a quoted key. This caused large OpenAPI specs (like Hetzner Cloud API)
to fail decoding.

Changes:
- Modified parseArrayHeaderLine to handle quoted keys
- Added logic to find bracket start after closing quote
- Unescape quoted keys properly
- Added 3 test cases for the new functionality

Closes #62

* fix: handle empty list items and nested objects in list items

This commit fixes two critical decoder bugs that prevented complex
OpenAPI specs (like DigitalOcean's 638 schemas) from being decoded:

1. Empty list items: Items encoded as just `-` (without space) were
   not recognized. The decoder only checked for `LIST_ITEM_PREFIX = '- '`.
   Fixed by adding check for both `- ` and `-` patterns.

2. Nested objects in list items: When a list item contains an object
   with nested properties (e.g., `allOf[2]: - properties: state: ...`),
   the decoder was looking for nested content at the wrong depth level.
   List items add one level of indentation, so nested content should be
   at baseDepth + 2, not baseDepth + 1.

   Fixed by creating `decodeKeyValueForListItem()` that correctly handles
   the extra nesting while maintaining proper followDepth for siblings.

Changes:
- Added `decodeKeyValueForListItem()` function to handle list item nesting
- Updated `decodeObjectFromListItem()` to use new function
- Added empty item detection in `decodeListArray()`
- Added comprehensive unit tests for both bugs
- Added integration test with real DigitalOcean OpenAPI spec (638 schemas)
- Gitignored large fixture files, added README with download instructions

Tests:
- 5 new unit tests in list-item-bugs.test.ts
- 1 integration test in digitalocean-decode.test.ts (skips if fixture missing)
- All 309 existing tests still pass

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

* perf: calculate depth on demand

* chore: move tests to test suite

* chore: test against new tests

---------

Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: Johann Schopplich <mail@johannschopplich.com>

pnpm-lock.yaml

@@ -102,8 +102,8 @@ importers:
   packages/toon:
     devDependencies:
       '@toon-format/spec':
-        specifier: ^1.3.0
-        version: 1.3.0
+        specifier: ^1.3.3
+        version: 1.3.3
 
 packages:
 
@@ -833,8 +833,8 @@ packages:
     peerDependencies:
       eslint: '>=9.0.0'
 
-  '@toon-format/spec@1.3.0':
-    resolution: {integrity: sha512-uZrR+aML7i6K1Lt8pedx24rxLKZbg2NjcDO/jVuBqjfQ/Is1kKHpyMMwCg88zQuXGQIgjogh7MbsNkmD5WNlxQ==}
+  '@toon-format/spec@1.3.3':
+    resolution: {integrity: sha512-AgOQGwv6EJUGj1zWjaSXMfFn3imsvwC3NHdaXLFmI6zF3dJ3LtrBzU4sg5meVJMO6bxgl4Wrl3/U/b53aDRSPA==}
 
   '@tybys/wasm-util@0.10.1':
     resolution: {integrity: sha512-9tTaPJLSiejZKx+Bmog4uSubteqTvFrVrURwkmHixBo0G4seD0zUxp98E1DzUBJxLQ3NPwXrGKDiVjwx/DpPsg==}
@@ -3042,7 +3042,7 @@ snapshots:
       estraverse: 5.3.0
       picomatch: 4.0.3
 
-  '@toon-format/spec@1.3.0': {}
+  '@toon-format/spec@1.3.3': {}
 
   '@tybys/wasm-util@0.10.1':
     dependencies: