Document sort, fix length(null), bump to 0.6.5

[Sander-Toonen]

Bundles the work done on docs/sort-function.

Changes

• Document the sort array function (1637568) — docs for the sort built-in.
• Fix length(null) to return 0 (1752fba) — the unary length operator stringified null to "null" (→ 4); it now treats null as an explicit empty value. Includes a regression test.
• Bump @pro-fa/expreszo to 0.6.5 (bd97ceb) — releases the length(null) fix.
• Fix all Dependabot vulnerabilities (6f28a77) — vitest ^4.1.0 (+ matching @vitest/*), qs pinned to ^6.15.2, vite pinned to ^6.0.1 so yarn 1 can link the vitest 4 tree, and "node" added to the core tsconfig types.

Note on overlap with main

main already received the vitest CI fix directly (commit 65ee645), so the vitest/vite/tsconfig changes here overlap with what's already on main and may surface a yarn.lock/package.json conflict on merge — both sides want the same versions, so it resolves trivially (run yarn install after). This branch additionally adds the explicit qs resolutions pin, which main does not yet have.

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[Copilot]

Pull request overview

Bundles three small unrelated changes: documents the existing sort array function in the language-service docs and quick-reference, fixes a length(null) bug where the unary length operator stringified null ("null".length === 4) and returned 4 instead of 0, and bumps the workspace's test toolchain (vitest 3 → 4, with matching @vitest/* packages), pins qs and vite via root resolutions, adds "node" to the core tsconfig types, and bumps @pro-fa/expreszo to 0.6.5.

Changes:

• Add sort entry to BUILTIN_FUNCTION_DOCS and to docs/quick-reference.md.
• Make length(null) return 0 (treats null as an explicit empty value) with a regression test.
• Upgrade vitest stack to ^4.1.0, pin qs ^6.15.2 and vite ^6.0.1 in root resolutions, add node to packages/expreszo/tsconfig.json types, and bump version to 0.6.5.

Reviewed changes

Copilot reviewed 9 out of 10 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
packages/expreszo/src/operators/unary/logical.ts	length now returns 0 for null instead of falling through to String(null).length.
packages/expreszo/test/functions/functions-string.ts	Adds regression test for length(null) === 0.
packages/expreszo/src/registry/builtin/function-docs.ts	Adds sort doc entry consumed by the language service.
docs/quick-reference.md	Adds sort row to the array functions table.
packages/expreszo/package.json	Bumps version to 0.6.5 and vitest devDeps to ^4.1.0.
packages/expreszo-mcp-server/package.json	Bumps vitest devDeps to ^4.1.0.
packages/expreszo-datetime/package.json	Bumps vitest devDeps to ^4.1.0.
package.json	Bumps root vitest to ^4.1.0 and pins qs/vite in resolutions.
packages/expreszo/tsconfig.json	Adds "node" to compiler types.
yarn.lock	Regenerated to reflect vitest 4 dep graph and qs/vite pins.

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