feat: Add OurDigital custom skills package (10 skills)

Complete implementation of OurDigital skills with dual-platform support
(Claude Desktop + Claude Code) following standardized structure.

Skills created:
- 01-ourdigital-brand-guide: Brand reference & style guidelines
- 02-ourdigital-blog: Korean blog drafts (blog.ourdigital.org)
- 03-ourdigital-journal: English essays (journal.ourdigital.org)
- 04-ourdigital-research: Research prompts & workflows
- 05-ourdigital-document: Notion-to-presentation pipeline
- 06-ourdigital-designer: Visual/image prompt generation
- 07-ourdigital-ad-manager: Ad copywriting & keyword research
- 08-ourdigital-trainer: Training materials & workshop planning
- 09-ourdigital-backoffice: Quotes, proposals, cost analysis
- 10-ourdigital-skill-creator: Meta skill for creating new skills

Features:
- YAML frontmatter with "ourdigital" or "our" prefix triggers
- Standardized directory structure (code/, desktop/, shared/, docs/)
- Shared environment setup (_ourdigital-shared/)
- Comprehensive reference documentation
- Cross-skill integration support

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

custom-skills/08-ourdigital-trainer/code/SKILL.md

@@ -0,0 +1,151 @@
+---
+name: ourdigital-trainer
+description: |
+  Training material creation and workshop planning for OurDigital.
+  Activated with "ourdigital" keyword.
+
+  Triggers:
+  - "ourdigital training", "ourdigital 교육"
+  - "ourdigital workshop", "ourdigital 워크샵"
+
+  Features:
+  - Template-based curriculum generation
+  - Evaluation form automation
+  - Material export
+version: "1.0"
+author: OurDigital
+environment: Code
+---
+
+# OurDigital Trainer (Code)
+
+Automated training material generation with script support.
+
+## Activation
+
+Only with "ourdigital" keyword:
+- "ourdigital training [topic]"
+- "ourdigital 워크샵 기획"
+
+## Quick Start
+
+```bash
+# Generate curriculum outline
+python code/scripts/generate_curriculum.py \
+  --topic "데이터 리터러시" \
+  --duration "4hours" \
+  --audience "마케터"
+
+# Create workshop agenda
+python code/scripts/create_workshop.py \
+  --topic "AI 활용법" \
+  --format "half-day" \
+  --participants 20
+
+# Generate evaluation form
+python code/scripts/create_evaluation.py \
+  --training "SEO 기초" \
+  --type "pre-post"
+```
+
+## Scripts
+
+| Script | Purpose |
+|--------|---------|
+| `generate_curriculum.py` | Create curriculum structure |
+| `create_workshop.py` | Design workshop agenda |
+| `create_evaluation.py` | Build assessment forms |
+| `export_materials.py` | Export to various formats |
+
+## Curriculum Generation
+
+```bash
+# Basic curriculum
+python code/scripts/generate_curriculum.py \
+  --topic "GTM 기초" \
+  --duration "2hours"
+
+# With specific objectives
+python code/scripts/generate_curriculum.py \
+  --topic "프롬프트 엔지니어링" \
+  --objectives "기초이해,실습,응용" \
+  --format markdown
+```
+
+## Workshop Templates
+
+| Format | Duration | Modules |
+|--------|----------|---------|
+| mini | 2 hours | 2 |
+| half-day | 4 hours | 3-4 |
+| full-day | 8 hours | 5-6 |
+| series | Multiple | Custom |
+
+```bash
+# Half-day workshop
+python code/scripts/create_workshop.py \
+  --topic "마케팅 자동화" \
+  --format half-day \
+  --output workshop.md
+```
+
+## Evaluation Types
+
+| Type | Purpose |
+|------|---------|
+| pre-post | 학습 전후 비교 |
+| satisfaction | 만족도 조사 |
+| knowledge | 지식 평가 |
+| application | 현업 적용도 |
+
+```bash
+# Create pre-post evaluation
+python code/scripts/create_evaluation.py \
+  --training "데이터 분석 기초" \
+  --type pre-post \
+  --questions 10
+```
+
+## Output Formats
+
+```bash
+# Markdown (default)
+python code/scripts/generate_curriculum.py --format markdown
+
+# JSON for integration
+python code/scripts/generate_curriculum.py --format json
+
+# Google Slides export
+python code/scripts/export_materials.py \
+  --input curriculum.md \
+  --format gslides
+```
+
+## File Structure
+
+```
+08-ourdigital-trainer/
+├── code/
+│   ├── SKILL.md
+│   └── scripts/
+│       ├── generate_curriculum.py
+│       ├── create_workshop.py
+│       ├── create_evaluation.py
+│       └── export_materials.py
+├── desktop/SKILL.md
+├── shared/
+│   ├── references/
+│   │   ├── training-frameworks.md
+│   │   └── activity-library.md
+│   └── templates/
+│       └── workshop-template.md
+└── docs/CHANGELOG.md
+```
+
+## Quick Commands
+
+| Command | Action |
+|---------|--------|
+| "ourdigital training [topic]" | Generate curriculum |
+| "ourdigital workshop [topic]" | Create agenda |
+| "ourdigital evaluation [training]" | Build assessment |