[x] implement fetch helper and mutation hook to POST new workout sessions
[x] implement INSERT query for workouts sessions (and entries)
Miscellaneous
[x] update usage of locally defined User type in client-side code -- use shared User type instead.
[x] update various types related to database models to match actual return (number->date for e.g. created_at fields, number->string | number for weights, which can be floats in the database)
Changes:
workout_sessions
tableworkout_session_entries
tableMiscellaneous
User
type in client-side code -- use sharedUser
type instead.number->date
for e.g.created_at
fields,number->string | number
for weights, which can be floats in the database)