feat: add 188+ agent skills (.agents/) and update project guidelines

- Add 188+ AI agent skill files across 11 categories (Development, DevOps, Security, Data, Design, Writing, Integrations, Documents & Media, Education)
- Update CLAUDE.md with new CI/CD Builder skill reference
- Update AGENTS.md with complete skill index organized by category
- Update .cursorrules configuration file
- Add .gitea/ workflows directory

.agents/color-palette.md

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+---
+name: color-palette
+display_name: Color Palette
+description: Build harmonious color palettes — complementary, analogous, triadic schemes with WCAG contrast checks and CSS variable exports.
+category: Creative & Design
+platforms: [claude.ai, api]
+version: 1.0.0
+author: Claude Code
+tags: [color-palette]
+---
+
+# Color Palette
+
+## Overview
+
+Build harmonious color palettes — complementary, analogous, triadic schemes with WCAG contrast checks and CSS variable exports.
+
+## When to Use This Skill
+
+Use **Color Palette** when you need to:
+
+- Work with color palette tasks in your project or workflow
+- Automate color palette operations at scale
+- Generate production-quality color palette output quickly
+
+## Instructions
+
+When this skill is active, Claude will:
+
+1. Understand the full context of your color palette request
+2. Apply best practices and conventions for Creative & Design
+3. Produce clean, well-structured, production-ready output
+4. Explain key decisions and offer alternatives where relevant
+
+## Examples
+
+### Example 1 — Basic Usage
+
+**User:** Help me get started with color palette.
+
+**Claude:** I'll walk you through the essential steps for color palette in your context...
+
+### Example 2 — Advanced Usage
+
+**User:** I need a production-ready color palette setup with full error handling.
+
+**Claude:** Here's a complete, production-hardened color palette implementation...
+
+## Guidelines
+
+- Always validate inputs before processing
+- Follow the conventions of the target platform or language
+- Prefer explicit over implicit — clarity beats cleverness
+- Include comments for non-obvious logic
+- Suggest tests or validation steps where appropriate
+
+## Dependencies
+
+Required: none
+
+## Platforms
+
+Available on: claude.ai, api
+
+---
+
+*Part of the [claude-skills](https://github.com/inbharatai/claude-skills) collection — 183+ skills for Claude.*