feat: bump versions

[GordonSmith]

No description provided.

[Copilot]

Pull Request Overview

This PR updates multiple dependencies and build tools to their latest versions, including a major version upgrade for Vitest (3.x → 4.x) with corresponding API changes, and incremental updates for Graphviz, Emscripten SDK, vcpkg, and various npm packages.

• Vitest upgraded from 3.2.4 to 4.0.9 with new browser provider API implementation
• Graphviz updated from 14.0.2 to 14.0.4 with SHA512 hash verification
• Build tools updated: Emscripten SDK (4.0.17 → 4.0.19), vcpkg (2025.09.17 → 2025.10.17)
• Consistent @hpcc-js/esbuild-plugins upgrades to 1.6.1 across all packages

Reviewed Changes

Copilot reviewed 16 out of 17 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
vitest-projects.ts	Added @vitest/browser-playwright import and migrated provider from string to function call syntax for Vitest 4.0 compatibility
vcpkg-overlays/graphviz/vcpkg.json	Updated Graphviz version from 14.0.2 to 14.0.4
vcpkg-overlays/graphviz/portfile.cmake	Updated SHA512 hash for Graphviz 14.0.4 source verification
tests/bundlers/package.json	Updated rollup (4.52.5 → 4.53.2) and @rollup/plugin-commonjs (28.0.8 → 29.0.0)
scripts/cpp-install-vcpkg.sh	Updated vcpkg build tools version from 2025.09.17 to 2025.10.17
scripts/cpp-install-emsdk.sh	Updated Emscripten SDK version from 4.0.17 to 4.0.19
packages/*/package.json	Consistently updated @hpcc-js/esbuild-plugins from 1.5.2 to 1.6.1 across all packages (base91, duckdb, expat, graphviz, llama, wasm, zstd)
packages/graphviz/tests/graphviz.spec.ts	Updated test expectation to verify Graphviz version 14.0.4
package.json	Updated root devDependencies including Vitest 4.0.9, new @vitest/browser-playwright package, ESLint, TypeScript tooling, and various other dependencies
README.md	Updated documentation to reflect Graphviz 14.0.4 and Emscripten SDK 4.0.19