chore(package): fix module resolution to support >=node10

[Floffah]

What this changes

Used ATTR & publint to ensure that all packages and paths are resolvable on node10, node16, and in bundlers

How I tested this

Build command now runs ATTR and publint

Checklist

• I have read CONTRIBUTING.md and this PR follows the guidelines
• A human has reviewed the entire diff of this PR, every line of code
• A human understands the changes and can explain why this approach is correct
• This PR doesn't have AI-generated boilerplate or co-author lines
• Tests pass
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)
• I have created a changeset (if appropriate)
• This PR was authored and submitted by an AI agent without human review

[github-actions]

Worth a look

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[changeset-bot]

🦋 Changeset detected

Latest commit: 58821e9

The changes in this PR will be included in the next version bump.

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[Copilot]

Pull request overview

Updates the monorepo packaging/build setup to validate published artifacts across different resolution environments (via ATTW + publint), and adjusts build outputs/exports to improve module/type resolvability.

Changes:

• Add a lint:package Turbo task and wire it into the root build pipeline.
• Update @sqts/core and @sqts/sql build/package metadata for dual ESM/CJS outputs (custom extensions, type: module, updated exports).
• Add a changeset and update lockfile/dependency versions to support the new packaging checks.

Reviewed changes

Copilot reviewed 7 out of 8 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
turbo.json	Adds lint:package task to Turbo config.
package.json	Runs turbo lint:package as part of build; adds ATTW CLI dependency and bumps tooling versions.
packages/core/tsdown.config.ts	Adjusts build output extensions and Node protocol handling; updates externals.
packages/sql/tsdown.config.ts	Adjusts build output extensions and externals.
packages/core/package.json	Updates package to ESM-by-default metadata + conditional exports/types layout; adds lint:package script.
packages/sql/package.json	Updates package to ESM-by-default metadata + conditional exports/types layout; adds lint:package script.
.changeset/tall-glasses-think.md	Declares patch releases for @sqts/core and @sqts/sql.
bun.lock	Lockfile updates for added/changed tooling deps.

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