feat: add 61 new skills from VoltAgent repository

- 27 official team skills (Sentry, Trail of Bits, Expo, Hugging Face, etc.)
- 34 community skills including context engineering suite
- All skills validated and compliant with V4 quality bar
- Complete source attribution maintained

Skills added:
- Official: commit, create-pr, find-bugs, iterate-pr, culture-index, fix-review, sharp-edges, expo-deployment, upgrading-expo, hugging-face-cli, hugging-face-jobs, vercel-deploy-claimable, design-md, using-neon, n8n-*, swiftui-expert-skill, fal-*, deep-research, imagen, readme, screenshots
- Community: frontend-slides, linear-claude-skill, skill-rails-upgrade, context-*, multi-agent-patterns, tool-design, evaluation, memory-systems, terraform-skill, and more

skills/imagen/SKILL.md

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+---
+name: imagen
+description: |
+source: "https://github.com/sanjay3290/ai-skills/tree/main/skills/imagen"
+risk: safe
+---
+
+# Imagen - AI Image Generation Skill
+
+## Overview
+
+This skill generates images using Google Gemini's image generation model (`gemini-3-pro-image-preview`). It enables seamless image creation during any Claude Code session - whether you're building frontend UIs, creating documentation, or need visual representations of concepts.
+
+**Cross-Platform**: Works on Windows, macOS, and Linux.
+
+## When to Use This Skill
+
+Automatically activate this skill when:
+- User requests image generation (e.g., "generate an image of...", "create a picture...")
+- Frontend development requires placeholder or actual images
+- Documentation needs illustrations or diagrams
+- Visualizing concepts, architectures, or ideas
+- Creating icons, logos, or UI assets
+- Any task where an AI-generated image would be helpful
+
+## How It Works
+
+1. Takes a text prompt describing the desired image
+2. Calls Google Gemini API with image generation configuration
+3. Saves the generated image to a specified location (defaults to current directory)
+4. Returns the file path for use in your project
+
+## Usage
+
+### Python (Cross-Platform - Recommended)
+
+```bash
+# Basic usage
+python scripts/generate_image.py "A futuristic city skyline at sunset"
+
+# With custom output path
+python scripts/generate_image.py "A minimalist app icon for a music player" "./assets/icons/music-icon.png"
+
+# With custom size
+python scripts/generate_image.py --size 2K "High resolution landscape" "./wallpaper.png"
+```
+
+## Requirements
+
+- `GEMINI_API_KEY` environment variable must be set
+- Python 3.6+ (uses standard library only, no pip install needed)
+
+## Output
+
+Generated images are saved as PNG files. The script returns:
+- Success: Path to the generated image
+- Failure: Error message with details
+
+## Examples
+
+### Frontend Development
+```
+User: "I need a hero image for my landing page - something abstract and tech-focused"
+-> Generates and saves image, provides path for use in HTML/CSS
+```
+
+### Documentation
+```
+User: "Create a diagram showing microservices architecture"
+-> Generates visual representation, ready for README or docs
+```
+
+### UI Assets
+```
+User: "Generate a placeholder avatar image for the user profile component"
+-> Creates image in appropriate size for component use
+```