Remove Type and Subtype from Body to match volcanism

[derrickmehaffy]

• Remove Type and just store a string
• Remove Subtype and just store a string
• Update API Docs to reflect changes
• Regenerate seed files/DB (Remove csv seed files for type/subtype)

After thinking about it, there is no reason we should split type and subtype to their own models with relations, we should just store them as a string thus our DB will update as EDSM does and we won't have to check for Anthors alias changes.

[derrickmehaffy]

Depends on: #71

[derrickmehaffy]

PR has been submitted and waiting build results to merge, marking as resolved