reorganize into a workspace of crates

[maxcountryman]

No description provided.

[codecov]

Codecov Report

Merging #86 (f8e0a37) into main (2f37fbb) will decrease coverage by 5.78%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #86      +/-   ##
==========================================
- Coverage   81.68%   75.91%   -5.78%     
==========================================
  Files          12       11       -1     
  Lines         486      465      -21     
==========================================
- Hits          397      353      -44     
- Misses         89      112      +23     

Files	Coverage Δ
memory-store/src/lib.rs	100.00% <ø> (ø)
moka-store/src/lib.rs	94.73% <ø> (ø)
mongodb-store/src/lib.rs	82.85% <ø> (ø)
redis-store/src/lib.rs	100.00% <100.00%> (ø)
sqlx-store/src/mysql_store.rs	89.47% <ø> (ø)
sqlx-store/src/postgres_store.rs	80.95% <ø> (ø)
sqlx-store/src/sqlite_store.rs	78.37% <ø> (ø)
tower-sessions-core/src/extract.rs	50.00% <ø> (ø)
tower-sessions-core/src/service.rs	72.18% <ø> (ø)
tower-sessions-core/src/session.rs	65.21% <ø> (ø)
... and 1 more