Restructure challenges into current and archive folders

challenges/current/readme.md

@@ -0,0 +1,29 @@
+---
+title: "Current & Upcoming Challenges"
+category: "challenges"
+subcategory: "current"
+order: 0
+description: "Active monthly challenges and upcoming challenge preview for the Fargo 3D Printing Meetup."
+tags:
+  - challenge
+  - active
+  - overview
+---
+
+# Current Challenges Hub
+
+This directory houses the active monthly challenge and the preview for the upcoming challenge.
+
+## Challenge Cycle
+
+Our monthly challenges follow a 3-stage lifecycle:
+
+1. **Announcement**: The challenge theme and requirements are announced at the monthly meetup.
+2. **Execution**: Makers work on their prints between meetups.
+3. **Judging & Voting**: Physical prints are brought to the following meetup for show & tell, community voting, and prizes.
+
+## Current Files
+
+- **[Active Challenge](current.md)**: September 2026 Practi"FALL" Prints (currently in execution, judging September 16th, 2026).
+- **[Upcoming Challenge Preview](upcoming.md)**: October 2026 preview (to be announced at the conclusion of the September meetup).
+- **[Challenge Archive](../archive/readme.md)**: Browse all completed past challenges from 2025 and 2026.