Jd/drop json3

[jd-lara]

Companion to Sienna-Platform/InfrastructureSystems.jl#571

[Copilot]

Pull request overview

Note

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This PR removes the JSON3 dependency and migrates JSON parsing/printing across the codebase, tests, and docs to use JSON.jl as a companion change to InfrastructureSystems.jl PR #571.

Changes:

• Replace JSON3.read(...) usage with JSON.parse(...; dicttype = Dict{String, Any}) in core code and tests.
• Replace JSON3 “pretty” output with JSON.jl output in serialization and documentation examples.
• Update project/test/docs environments to depend on JSON instead of JSON3.

Reviewed changes

Copilot reviewed 9 out of 10 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/base.jl	Switch system JSON parsing/serialization from JSON3 to JSON.jl and update docstrings accordingly.
src/PowerSystems.jl	Replace import JSON3 with import JSON.
test/common.jl	Switch JSON parsing in serialization validation to JSON.jl.
test/test_plant_attributes.jl	Update JSON import and parsing in plant attribute tests.
test/test_generate_structs.jl	Update JSON parsing for generated-struct descriptor validation.
test/runtests.jl	Replace test-suite JSON import to JSON.jl.
docs/src/how_to/parse_ts_from_csvs.md	Update documentation examples to use JSON.jl instead of JSON3.
Project.toml	Replace JSON3 dependency/compat with JSON and update InfrastructureSystems source pin.
test/Project.toml	Replace JSON3 dependency/compat with JSON and add source pins for dependencies.
docs/Project.toml	Replace JSON3 dependency with JSON for docs environment.

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[Copilot]

JSON.json in JSON.jl returns a String and does not take an IO as the first argument, and pretty is not a supported keyword in JSON.jl. To write pretty-formatted JSON to a file, use JSON.print(io, metadata; indent = 2) (or write the result of JSON.json(metadata; indent = 2) to io).

Suggested change

	JSON.json(io, metadata; pretty = 2)
	JSON.print(io, metadata; indent = 2)

[Copilot]

In JSON.jl, pretty is not a valid keyword (use indent), and JSON.json(...) produces a string rather than printing like JSON3.@pretty. If the intention is to display formatted JSON in the docs build, switch to an API that prints (e.g., JSON.print(...; indent = 2) or println(JSON.json(...; indent = 2))).

Suggested change

	JSON.json(JSON.parse(f; dicttype = Dict{String, Any}); pretty = 2) # hide
	JSON.print(JSON.parse(f; dicttype = Dict{String, Any}); indent = 2) # hide

[Copilot]

Committing [sources] pins tests to specific branches/SHAs and can unexpectedly change dependency resolution in CI and for contributors running the test environment, reducing reproducibility. Prefer relying on registry versions (via [compat]) and/or using a Manifest.toml for CI pinning, or keep these overrides out of the committed test/Project.toml unless they’re strictly required long-term.

Suggested change

	[sources]
	InfrastructureSystems = {url = "https://github.com/NREL-Sienna/InfrastructureSystems.jl", rev = "jd/drop_json3"}
	PowerSystemCaseBuilder = {url = "https://github.com/NREL-Sienna/PowerSystemCaseBuilder.jl", rev = "psy6"}

[jd-lara]

the tests will still fail until TableDataParser is merged onto the registry