fix: redirect all explore requests to the new explore page

[brandonroberts]

Description

• Adds redirects to the new explore page from the topic-based pages

Related Tickets & Documents

Closes #4111

Mobile & Desktop Screenshots/Recordings

Steps to QA

1. Go to /explore/topic/typescript
2. Go to /typescript
3. Go to /typescript/dashboard
4. Note all should redirect to /explore

Tier (staff will fill in)

• [ ] Tier 1
• [ ] Tier 2
• [ ] Tier 3
• [x] Tier 4

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