feat: add new OpenSpec skills for change management and onboarding

- Created `openspec-ff-change` skill for fast-forward artifact creation.
- Introduced `openspec-new-change` skill for structured change creation.
- Developed `openspec-onboard` skill for guided onboarding through OpenSpec workflow.
- Added `openspec-sync-specs` skill for syncing delta specs to main specs.
- Implemented `openspec-verify-change` skill for verifying implementation against change artifacts.
- Updated `.gitignore` to exclude OpenSpec generated files.
- Added `skills-lock.json` to manage skill dependencies.

.agents/skills/tailwindcss/references/typography-list-style.md

@@ -0,0 +1,65 @@
+---
+name: typography-list-style
+description: Controlling list marker style and position with list-style-type and list-style-position
+---
+
+# List Style
+
+Utilities for controlling the marker style and position of list items.
+
+## Usage
+
+### List style type
+
+```html
+<ul class="list-disc">
+  <li>Disc bullets (default for ul)</li>
+</ul>
+
+<ol class="list-decimal">
+  <li>Decimal numbers (default for ol)</li>
+</ol>
+
+<ul class="list-none">
+  <li>No markers (often with custom bullets via before/after)</li>
+</ul>
+
+<!-- Custom value -->
+<ol class="list-[upper-roman]">Roman numerals</ol>
+<ul class="list-(--my-marker)">Custom property</ul>
+```
+
+### List style position
+
+```html
+<!-- Bullets inside content flow -->
+<ul class="list-inside list-disc">
+  <li>5 cups chopped Porcini mushrooms</li>
+</ul>
+
+<!-- Bullets outside content flow (default) -->
+<ul class="list-outside list-disc">
+  <li>5 cups chopped Porcini mushrooms</li>
+</ul>
+```
+
+### Responsive
+
+```html
+<ul class="list-none md:list-disc md:list-outside">...</ul>
+```
+
+## Key Points
+
+- `list-disc` - disc bullets (ul default)
+- `list-decimal` - decimal numbers (ol default)
+- `list-none` - no markers
+- Custom: `list-[upper-roman]`, `list-[lower-alpha]`, `list-(--var)`
+- `list-inside` - markers inside content box
+- `list-outside` - markers outside content box (default)
+
+<!--
+Source references:
+- https://tailwindcss.com/docs/list-style-type
+- https://tailwindcss.com/docs/list-style-position
+-->