chore: complete Godot toolchain bump from 4.2.2 to 4.7.1

[itsmiso-ai]

Updated Godot toolchain to 4.7.1 across configs, docs, and CI actions to fix issue #314

Fixes #314

Opened by foreman on review GO (workload wl-misospace-windowstead-314).

[its-saffron]

AI Automated Review

Full PR review.

Analysis engine: dsv4f@https://litellm.jory.dev/v1 (openai) — primary route

Recommendation

Approve. This is a documentation/config cleanup that completes the Godot 4.7.1 toolchain bump by removing all remaining stale 4.2.2 references. The underlying godot-toolchain.json version was already updated to 4.7.1 in a prior PR (PR 322), and every CI check on this commit is green.

Change-by-change review

• .github/actions/load-godot-toolchain/action.yml — output description example updated from 4.2.2 to 4.7.1; matches the centralized toolchain config.
• .justfile — default Linux Godot binary path updated to Godot_v4.7.1-stable_linux.x86_64; aligns with the toolchain JSON and CI install path.
• AGENTS.md — validation command updated to the 4.7.1 binary; consistent with CI usage.
• CONTRIBUTING.md — prerequisites, run commands, and smoke-test commands updated to 4.7.1; no stale 4.2.2 references remain.
• README.md — run and smoke-test commands updated to 4.7.1.
• docs/toolchain-update.md — example version field updated to 4.7.1.
• project.godot — config/features changed from PackedStringArray("4.2") to PackedStringArray("4.7"), matching Godot's major.minor feature-string convention for the 4.7 line.

A repository-wide grep at head finds no remaining 4.2.2 references.

Standards Compliance

The repository standards from AGENTS.md are respected:

• No source version bump is made; releases are tag-driven, and none is needed here.
• The toolchain version string remains centralized in godot-toolchain.json; the local .justfile/docs constants are aligned with it.
• Updated validation commands in AGENTS.md and CONTRIBUTING.md stay consistent with how CI invokes the engine.

Linked Issue Fit

Issue PR 314 asked for a toolchain bump to a recent stable 4.x: update godot-toolchain.json, project.godot features, and doc/justfile references, with all CI green. At this PR's head:

• godot-toolchain.json already contains "version": "4.7.1" (updated by PR 322; not part of this diff).
• project.godot features are updated to 4.7.
• All stale doc/justfile references are now updated.
• CI shows all required checks succeeding: headless smoke test, script test suite (Linux + macOS), and export validation for Linux, Windows, and macOS.

No web preset was added by this change, so the issue's conditional web-export verification does not apply here.

Unknowns / Needs Verification

The full contents of godot-toolchain.json are outside this PR's diff, so the three sha256 checksum values could not be independently verified against the 4.7.1 archives from this corpus alone. The green CI install/export jobs on commit e14bb94 provide strong indirect evidence that the configured toolchain downloads and exports correctly. Web-export compilation remains unverified because no web preset exists in this change.