ci: specify Xcode 16.4 on macOS 15.5 for macOS / iOS builds.

[laosb]

Summary by Sourcery

Pin macOS CI runners to macOS 15 and select Xcode 16.4 for macOS and iOS build pipelines

CI:

• Change runs-on from macos-latest to macos-15 for macOS and iOS build-and-release jobs
• Add xcode-select commands to use Xcode 16.4 in CI setup scripts

Chores:

• Fix whitespace in cargo install rinf_cli command

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

This PR pins macOS GitHub runners to the macos-15 environment and explicitly selects Xcode 16.4 in CI setup scripts to ensure consistent build tooling for Mac and iOS workflows.

Flow diagram for CI setup with Xcode 16.4 selection

flowchart TD
    Start([Start CI Job]) --> SelectRunner["Use macos-15 runner"]
    SelectRunner --> XcodeSelect["sudo xcode-select -s /Applications/Xcode_16.4.app"]
    XcodeSelect --> InstallDeps["Install dependencies (CocoaPods, lmdb, create-dmg, rinf_cli)"]
    InstallDeps --> Build["Run build steps"]
    Build --> End([End CI Job])

Loading

File-Level Changes

Change	Details	Files
Pin macOS runners to macos-15 for build-and-release jobs	Changed runs-on from macos-latest to macos-15 for build-macos Changed runs-on from macos-latest to macos-15 for build-and-release-mac-app-store Changed runs-on from macos-latest to macos-15 for build-and-release-ios-app-store	.github/workflows/build.yml
Explicitly select Xcode 16.4 in CI scripts	Added sudo xcode-select -s /Applications/Xcode_16.4.app to macOS install script Added sudo xcode-select -s /Applications/Xcode_16.4.app to iOS setup script	scripts/macos_1_ci_install.sh scripts/apple/ios/1_ci_setup_deps.sh
Fix whitespace in Cargo install command	Removed extra leading space before cargo install invocation	.github/workflows/build.yml

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[laosb]

Test run on my fork: https://github.com/laosb/rune/actions/runs/17114806988

[sourcery-ai]

Hey there - I've reviewed your changes and they look great!

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