✨ Set up GitHub Copilot instructions (#25)

* Initial plan

* Add GitHub Copilot instructions file

Co-authored-by: Tiberriver256 <[email protected]>

* Improve consistency in version references and reduce duplication

Co-authored-by: Tiberriver256 <[email protected]>

* Fix gem version format for consistency

Co-authored-by: Tiberriver256 <[email protected]>

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Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: Tiberriver256 <[email protected]>

Author: Copilot

.github/copilot-instructions.md

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+# GitHub Copilot Instructions
+
+This file provides guidance to GitHub Copilot when working with code in this repository.
+
+## Project Overview
+
+This is a Jekyll-based blog hosted on GitHub Pages, using the Neo-HPSTR theme. The site belongs to Micah Rairdon (Tiberriver256) and primarily focuses on PowerShell, software development, and technology topics.
+
+## Technology Stack
+
+- **Jekyll 3.9.0** - Static site generator
+- **GitHub Pages gem ~> 209** - Hosting platform
+- **Ruby** - Runtime environment
+- **Kramdown** - Markdown processor
+- **Neo-HPSTR Jekyll Theme** (customized)
+
+## Common Development Commands
+
+### Jekyll Development
+- **Local development**: `bundle exec jekyll serve`
+- **Build for production**: `bundle exec jekyll build`
+- **Install dependencies**: `bundle install`
+
+## Repository Structure
+
+### Content Organization
+- **Posts**: `_posts/` - Blog articles in markdown with YAML front matter
+- **Layouts**: `_layouts/` - HTML templates (post.html, page.html, post-index.html)
+- **Includes**: `_includes/` - Reusable components (head.html, header.html, footer.html, etc.)
+- **Assets**: `assets/css/` and `assets/js/` for stylesheets and JavaScript
+- **Images**: `images/` with subdirectories for each post's assets
+- **Configuration**: `_config.yml` contains site settings, owner info, and Jekyll configuration
+
+### Key Features
+- **Automatic OG image generation**: Uses Cloudinary API for dynamic social media images
+- **Giscus comments**: Integrated GitHub-based commenting system
+- **Search functionality**: JSON-based search via `search.json`
+- **RSS feed**: Generated at `/feed.xml`
+- **Google Analytics**: Configured with tracking ID G-4DS8LE3MB2
+
+## Content Guidelines
+
+### Creating New Blog Posts
+
+1. **File naming**: `YYYY-MM-DD-title-slug.md` in `_posts/` directory
+2. **Required front matter**:
+   ```yaml
+   ---
+   published: true
+   layout: post
+   title: "Your Title Here"
+   description: "SEO description (150-160 chars max)"
+   modified: YYYY-MM-DD
+   tags:
+     - Tag1
+     - Tag2
+   categories:
+     - Category
+   ---
+   ```
+
+### SEO Requirements
+- **Title**: 50-60 characters (6-10 words ideal)
+- **Description**: 150-160 characters maximum
+- **Tags**: 2-5 relevant tags maximum
+- **Keywords**: Include primary keyword naturally in title, description, and content
+
+### Content Structure Standards
+1. **Opening**: Hook the reader immediately
+2. **Problem/Context**: Clearly define what you're addressing
+3. **Solution/Content**: Provide detailed, actionable value
+4. **Conclusion**: Summarize key takeaways
+
+### Image Management
+- **Storage**: `images/[post-slug]/filename.ext`
+- **Reference in posts**: `{% include image.html path="filename.ext" alt="description" %}`
+- **Path format**: Filename only (not full URL or folder path)
+- Cloudinary handles automatic optimization and social media image generation
+
+## Code Style and Conventions
+
+### Writing Style (Strunk & White + Zinsser)
+- **Clarity over cleverness**: "Clear thinking becomes clear writing"
+- **Omit needless words**: Delete 10% of words each revision pass
+- **Active voice**: "Who does what?" structure
+- **Unity of design**: One paragraph = one topic
+- **Write to one reader**: Personal, conversational tone
+- **Read aloud**: Test for logic jumps and rhythm
+
+### Markdown Conventions
+- Use fenced code blocks with language specification
+- Keep paragraphs short and scannable
+- Use descriptive link text
+- Include alt text for all images
+
+## Configuration Files
+
+- **Main config**: `_config.yml` - Site settings, owner info, and Jekyll configuration
+- **Dependencies**: `Gemfile` - Specifies Jekyll 3.9.0 and github-pages ~> 209
+- **Permalink structure**: `/:categories/:title/`
+- **Pagination**: 5 posts per page
+
+## Additional Resources
+
+For comprehensive writing guidelines, refer to:
+- `.github/instructions/writers-guide.instructions.md` - Detailed writer's guide
+- `.github/chatmodes/editor-review.chatmode.md` - Editorial review chatmode
+- `CLAUDE.md` - Claude-specific instructions
+
+## Guest Posts
+
+- Include attribution: `> Guest post authored by [Name](url). Additional context.`
+- Follow same SEO and content structure guidelines