Add full Team 2890 roster — all 18 members with profiles

Students:
- fox.md (electrician)
- big-papa.md (student coach)
- jacob-firebreaker019.md (driver, 2026)
- jacob-m-jawarrior.md (programmer)
- ryan.md (operator)
- riley.md (technician) — updated with full profile
- steven.md (human player)
- alex-c.md (mentor, 21yr FRC vet)
- matthew.md (observer)
- kiera.md (team mascot)

Leadership/Mentors:
- gina-nakahara-clark.md (founding teacher)
- mr-douglas.md (programming mentor)
- walt.md (head mentor)
- chris-slater.md (lead coach)
- jackie.md (team mom)
- kp.md (rules guy)

Alumni:
- jacoby-powell.md (alumni/mentor)
- greyson-w.md (alumni/mentor, top coder)

Each profile includes: role, training track, status, emoji nickname, hub links

entities/greyson-w.md

@@ -0,0 +1,47 @@
+---
+type: alumni-profile
+date: 2026-03-13
+updated: 2026-05-05
+discord: TBD
+role: alumni-mentor
+track: programming
+nickname: "Greyson W" / "Big Podcake"
+emoji: "🎂"
+status:
+  mentorship: available
+  expertise: advanced
+---
+
+# Greyson W "Big Podcake" — Alumni/Mentor
+
+## Who They Are
+- **Role:** Alumni / Mentor
+- **Nickname:** Greyson W, "Big Podcake"
+- **Emoji:** 🎂
+- **Team:** Former student, now trusted mentor
+
+## Training Progress
+
+| Track | Level | Status |
+|-------|-------|--------|
+| Programming | Advanced | Alumni mentor |
+| FRC Coding | Expert | Available |
+
+## Notes
+- Top coder on the team when a student
+- Go-to for coding help even as an alumni
+- Available for questions about programming and technical challenges
+
+## Expertise Areas
+- Java programming
+- WPILib
+- YAGSL implementation
+- General FRC code architecture
+
+## Related Training Hubs
+- [[programming-hub]] — can serve as coding mentor resource
+- [[swerve-training-hub]] — YAGSL odometry questions
+
+---
+
+*Profile managed by MrC.*