DRDB lookup pages

[philiptzou]

Create lookup pages for following DRDB tables:

• variants - probably merge with mutation-viewer?: 4 hours
• mutations: 4 hours
• antibodies: 4 hours
• vaccines: 4 hours

[KaimingTao]

Wildtype mutations page: https://covdb.stanford.edu/page/wildtype
mAb synonyms page: https://covdb.stanford.edu/page/mab-synonyms