Add .npmignore to exclude __tests__ from publish, remove unused deps

[pyramation]

Summary

This PR makes two changes to clean up the publish configuration:

1. Added .npmignore files to all 20 packages - Each file contains __tests__ to exclude test directories from npm publish
2. Removed unused root dependencies and config:
   • Removed workspaces field from package.json (redundant with pnpm-workspace.yaml)
   • Removed unused devDependencies: cpy-cli, graphile-test, graphql-tag (only referenced in READMEs, no actual imports)
3. Regenerated pnpm-lock.yaml to sync with the dependency removals

Review & Testing Checklist for Human

• Run pnpm pack --dry-run in a package directory to confirm __tests__ is excluded from the tarball
• Verify lerna commands still work without the workspaces field in package.json (lerna.json has "npmClient": "pnpm" so it should use pnpm-workspace.yaml)

Recommended test plan: Pick one package (e.g., packages/verify), run pnpm pack --dry-run and verify the output excludes __tests__/ but includes the expected files (deploy/, verify/, revert/, sql/, LICENSE, Makefile, README.md, pgpm.plan, *.control).

Notes

The .npmignore approach excludes __tests__ but doesn't explicitly whitelist only the desired files. Other files like jest.config.js will still be included in publish. If stricter filtering is needed, consider using the "files" field in each package's package.json instead.

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Link to Devin run: https://app.devin.ai/sessions/8d0bb3e7eee3456788d7919f36fd1880
Requested by: Dan Lynch (@pyramation)

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