Add website events guide

[MathyouMB]

As a volunteer or exec, I want a clear guide on how to add events to the CCSS website so that I can promote upcoming events without needing to ask for help or dig through the repo.

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🧠 Context

We currently don’t have a documented guide on how to add events to the CCSS website. Contributors are expected to know how the CarletonComputerScienceSociety/website repo works and where to place files, which creates unnecessary friction.

We should publish a page at:

https://handbook.carletoncomputersciencesociety.ca/docs/guides/website/add-events

This page should provide a step-by-step guide with code examples showing:

• How to add a new event to the website
• Where to put the markdown file
• Where to upload the event poster

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🛠️ Implementation Plan

1. Create a new page at:
   docs/guides/website/add-events.md

2. Write a guide on this page:

   • A short intro sentence explaining that this guide helps you add an event to the CCSS website

   • Step 1: Create an event markdown file

     • Go to content/events

     • Add a new file named something like 2024-09-10-frosh-social.md

     • Include an example frontmatter and body content:

       ---
       title: "Frosh Social"
       date: 2024-09-10
       time: "6:00 PM"
       location: "Canal Ritz"
       preview: "images/event_posters/2024/frosh-social.jpg"
       ---
       Come meet your fellow first-years and have fun at our first social event of the year!

   • Step 2: Add your event poster

     • Upload your image to static/images/event_posters
     • Recommended path: images/event_posters/2024/event-name.jpg

   • Step 3: Commit your changes

     • Include both the markdown file and the image in your PR
     • Example commit message:
       Add Frosh Social event for Sept 10

3. Ensure the page has proper formatting

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✅ Acceptance Criteria

• A new page exists at docs/guides/website/add-events.md

• The guide includes:

  • A clear explanation of where to add the event markdown file
  • An example frontmatter block and markdown body
  • Instructions for uploading the poster image
  • A sample commit message

• All links point to the correct GitHub repo paths

• The page is properly formatted and appears in the sidebar under "Guides > Website"