feat(sql): add sql standard interfaces

[halvardssm]

Status: semi-stable (can be changed if community reaches other consensus)
JSR: https://jsr.io/@stdext/sql/versions

This was origionally created and discussed here.

Reason

Having a standardized interface for relational databases in JavaScript and TypeScript has been brought up every now and then in the Deno DB community, but as Deno was still in its early days, and the community was young, it was never started. However, as Deno is becoming more stable, supports NPM and Node, and we got JSR, it is time to consolidate and create a standard for relational (sql-based) database clients.

Implementations

• Implement SQLx interface denodrivers/mysql#170
• Implement SQLx interface denodrivers/sqlite3#124

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 74.30876% with 223 lines in your changes missing coverage. Please review.

Project coverage is 88.82%. Comparing base (76de73f) to head (85605ad).

Files	Patch %	Lines
sql/asserts.ts	54.05%	170 Missing ⚠️
sql/testing.ts	88.93%	25 Missing ⚠️
sql/events.ts	79.26%	17 Missing ⚠️
collections/deferred_stack.ts	95.97%	6 Missing and 1 partial ⚠️
sql/errors.ts	50.00%	4 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main       #5      +/-   ##
==========================================
- Coverage   90.40%   88.82%   -1.59%     
==========================================
  Files          12       19       +7     
  Lines        7935     8803     +868     
  Branches       67       95      +28     
==========================================
+ Hits         7174     7819     +645     
- Misses        761      983     +222     
- Partials        0        1       +1     

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