docs: update to CAP 10 and Node.js 22+ (24 LTS recommended)

[jung-thomas]

Summary

Aligns all documentation with the CAP 10 upgrade already reflected in package.json (@sap/cds ^10.0.3, engines.node >=22.0.0) and the CI matrix (Node 22.x/24.x). The code was already on CAP 10 / Node 22+; the prose docs and generated agent-instruction artifacts had lagged behind at Node 20.19.0 / CAP 9.

Consistent phrasing used throughout: minimum Node.js 22, Node.js 24 LTS highly recommended (following the SAP CAP 10 recommendation).

Changes

Hand-maintained docs

• README.md, CLAUDE.md
• docs/01-getting-started/{index,installation}.md
• docs/03-features/vscode-extension.md, docs/03-features/mcp/{server-updates,server-implementation-complete}.md
• docs/99-reference/faq-extended.md, docs/troubleshooting/index.md

Developer instructions

• .github/instructions/project-overview.instructions.md — Node ≥22, @sap/cds 9.7.1 → 10.x, version-validation note
• .github/instructions/ci-cd-workflows.instructions.md — corrected stale matrix to Node 22.x/24.x (was documenting a 20/22/24 matrix that no longer matches the workflow)

Generator + regenerated artifacts

• scripts/generate-agent-instructions.js:
  • Node requirement was hardcoded in two emit sites — now emits Node.js ≥ 22.0.0 (Node.js 24 LTS recommended)
  • Also fixed a pre-existing bug: the dynamic import() paths and getVersion() still used ./bin/… / ./mcp-server/… / __dirname/package.json after the script was moved into scripts/ in 750bc5e, so the generator had been crashing on every run. Corrected to ../.
• Regenerated all of agent-instructions/ (v4.202607.0) — version stamps 4.202603.2 → 4.202607.0, generated date refreshed, Node requirement updated, plus command content that had drifted since the last successful generation.

Not included

Stray dependency bumps (package.json, npm-shrinkwrap.json) and vscode-extension/esbuild.config.mjs present in the working tree were intentionally left out — they belong in a separate dependency-update change.

Verification

• npx eslint scripts/generate-agent-instructions.js → clean
• npm run generate:agent-instructions → runs cleanly (173 commands, 29 files)
• Post-regen grep confirms no 20.19.0 / ≥ 20 / 4.202603 references remain in agent-instructions/