chore: align dev dependencies across workspaces

[mrgrain]

This PR aligns dev dependencies across all workspace packages and replaces ts-node with tsx as a dev tool.

Previously, several shared dev dependencies were allowed to drift independently across workspaces. This caused packages like cdk-assets-lib and cloud-assembly-api to use jest 30 while the rest of the repo was on jest 29, eslint-plugin-prettier ranged from v4 to v5, and @types/node varied from ^16 to ^18 depending on each package's minNodeVersion.

Enabling consistentVersions for eslint-config-prettier, eslint-plugin-prettier, jest, and @types/jest ensures the root workspace version is enforced everywhere via yarn constraints. The root versions are set to the most common versions already in use (jest@^29, eslint-plugin-prettier@^4, eslint-config-prettier@^10), so most packages see no functional change.

For @types/node, projen's minNodeVersion kept overriding the version back to ^16. This is worked around by calling addDevDeps('@types/node@^20') on all projects after configuration, which takes precedence over the minNodeVersion-derived default.

The fs-extra dependency is upgraded from ^9 to ^11 across all packages (aws-cdk, toolkit-lib, integ-runner, cli-integ, cdk-assets-lib) along with @types/fs-extra to ^11. This removes the old fs-extra@^9 and @types/fs-extra@^9 from the lockfile entirely.

The ts-node to tsx switch only affects the aws-cdk pre-compile task (user-input-gen.ts) and the cdk-assets-lib manual test script. Both are internal dev scripts, not user-facing.

Checklist

• This change contains a major version upgrade for a dependency and I confirm all breaking changes are addressed
  • eslint-plugin-prettier is downgraded from v5 to v4 in some workspaces (aligning to the majority version). No breaking changes since v4 is the less restrictive version.
  • fs-extra upgraded from v9 to v11. The API is backwards compatible; v10 dropped Node 10/12 support and v11 dropped Node 14 support, both well below our minimum.
  • @types/node upgraded from ^16/^17/^18 to ^20. This provides more accurate type definitions for the Node versions we actually target.

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By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.30%. Comparing base (841b47e) to head (3e32842).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1341   +/-   ##
=======================================
  Coverage   88.30%   88.30%           
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  Files          73       73           
  Lines       10386    10386           
  Branches     1412     1412           
=======================================
  Hits         9171     9171           
  Misses       1188     1188           
  Partials       27       27           

Flag	Coverage Δ
suite.unit	88.30% <100.00%> (ø)

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