feat(minato): support subquery, fix koishijs/koishi#595

[Hieuzest]

This pr is rebased to first-class json type.

ref: koishijs/koishi#595

Features

• Selection<S>.evaluate<T>(callback: Callback<S, T>): Expr<T>

convert the selection into subquery using ther aggregation callback in type of Expr<T>, therefore it can be used in any place a Expr<T> can fill.

Eg.

assert((await database.select('bar').execute(row => $.count(row.id))) === 6)
const one = database.select('bar').evaluate(row => $.subtract($.count(row.id), 5))
// We can replace all constant integers inside expressions using one
// ...

• Selection<S>.evaluate<K extends Keys<S>>(field: K): Expr<S[K][]>

Pick the specific field of the selection and aggregate all rows into array

Eg.

database.select('foo')
  .project({
    x: r => database.select('bar').where(row => $.lt(row.uid, r.id)).evaluate('id')
  })
.execute()
// Get id list and store into single field

• Selection<S>.evaluate(): Expr<S[]>
  shortcut for Selection.evaluate(row => $.array($.object(row)))

Check tests for more usage

Changes

• Refactor mongo's eval() to make all pipeline processed at server side
• Use procedures to bypass the field accessing limitation in inner derived tables
• Refactor memory driver

Tasks

• mongo
• mysql8.0/sqlite
• mysql5.7/mariadb
• memory
• non-aggr subquery return list
• more test for nested subqueries

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (b15354a) 93.34% compared to head (1d1e9ca) 93.64%.

Files	Patch %	Lines
packages/memory/src/index.ts	96.29%	1 Missing ⚠️
packages/mongo/src/utils.ts	99.29%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #41      +/-   ##
==========================================
+ Coverage   93.34%   93.64%   +0.30%     
==========================================
  Files          28       28              
  Lines        8079     8405     +326     
  Branches     1960     2058      +98     
==========================================
+ Hits         7541     7871     +330     
+ Misses        538      534       -4     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.