Automate dependency management of spx2

[nighca]

• Install spx2 as an external dependency instead of committing it, close Automate dependency management of spx2 #1202.

• Standardized global toolchain versions and build scripts:

  • Global toolchain versions: Go v1.23.4, Node v20.11.1

    For internal projects, which requires different version of go toolchain, e.g., tools/fmt & tools/ispx, use GOTOOLCHAIN=gox.y.z to specify it locally

  • Consistent build scripts for three environments (GitHub Action, Vercel, Docker)

    # Install deps
    npm install
    ./install-spx.sh
    
    # Run or build code
    ./build-wasm.sh
    npm run dev # or `npm run build`

• Remove outdated content from spx-gui/README.md.

Related:

• SPX 2.0 Integration #1083
• https://stackoverflow.com/questions/77969574/why-does-the-toolchain-directive-have-no-effect-in-this-case

[qiniu-prow]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[aofei]

Suggested change

	- name: Setup Go 1.23.4
	- name: Set up Go

这样应该就好？写两次版本号怪麻烦的😂

[nighca]

嗯是的现在版本号没必要了

[nighca]

done https://github.com/goplus/builder/compare/1a7357fc37083c874318b8e8a469c701b79979ce..113727460a750a764673abcc7ae2622ea7e814b9

[qiniu-ci]

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Warning

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