Add Text-Generator.io and OpenPaths to APIs & Services

[lee101]

Summary

• Adds a new APIs & Services subsection under Tools with two entries:
  • Text-Generator.io — Unified text, vision, and speech API with privacy-first design
  • OpenPaths — Open source model router with universal API for LLMs
• Both are actively maintained tools that complement the existing Models and Developer Tools sections

Test plan

• Verify links resolve correctly
• Confirm formatting matches existing list style (em dash separator, sentence descriptions)

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