Add json output to uv tool list

[ThiefMaster]

No tests etc yet until the JSON format etc is fine. Added tests after it turned out to be trivial, snapshot tests FTW! :)

Sample output:

without --outdated:

Details

{
  "schema": {
    "version": "preview"
  },
  "tools": [
    {
      "name": "httpie",
      "version": "3.2.3",
      "latest_version": null,
      "path": "/home/adrian/.local/share/uv/tools/httpie",
      "commands": [
        {
          "name": "http",
          "path": "/home/adrian/.local/bin/http"
        },
        {
          "name": "httpie",
          "path": "/home/adrian/.local/bin/httpie"
        },
        {
          "name": "https",
          "path": "/home/adrian/.local/bin/https"
        }
      ],
      "extras": [],
      "version_specifiers": "",
      "with": [],
      "python": {
        "implementation": "cpython",
        "version": "3.12.2",
        "key": "cpython-3.12.2-linux-x86_64-gnu"
      }
    },
    {
      "name": "twine",
      "version": "6.2.0",
      "latest_version": null,
      "path": "/home/adrian/.local/share/uv/tools/twine",
      "commands": [
        {
          "name": "twine",
          "path": "/home/adrian/.local/bin/twine"
        }
      ],
      "extras": [
        "keyring"
      ],
      "version_specifiers": ">=6.2.0, !=69",
      "with": [
        "markupsafe!=69",
        "werkzeug"
      ],
      "python": {
        "implementation": "cpython",
        "version": "3.13.3",
        "key": "cpython-3.13.3-linux-x86_64-gnu"
      }
    },
  ]
}

with --outdated:

Details

{
  "schema": {
    "version": "preview"
  },
  "tools": [
    {
      "name": "httpie",
      "version": "3.2.3",
      "latest_version": "3.2.4",
      "path": "/home/adrian/.local/share/uv/tools/httpie",
      "commands": [
        {
          "name": "http",
          "path": "/home/adrian/.local/bin/http"
        },
        {
          "name": "httpie",
          "path": "/home/adrian/.local/bin/httpie"
        },
        {
          "name": "https",
          "path": "/home/adrian/.local/bin/https"
        }
      ],
      "extras": [],
      "version_specifiers": "",
      "with": [],
      "python": {
        "implementation": "cpython",
        "version": "3.12.2",
        "key": "cpython-3.13.2-linux-x86_64-gnu"
      }
    }
  ]
}

closes #10219

[ThiefMaster]

Should this be an Option that's None when there aren't any version specifiers to get null instead of an empty string in the JSON data?

[ThiefMaster]

I kept this because it's used in the existing text output code. I could not find any case where we'd get multiple items here, because we only have one requirement as input here, and source.to_string already produces a single string.

[ThiefMaster]

I limited this to useful data like in the text output but included the key to allow matching it with data from uv python list

[codspeed-hq]

Merging this PR will improve performance by 5.03%

⚡ 1 improved benchmark
✅ 20 untouched benchmarks
⏩ 6 skipped benchmarks¹

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
⚡	WallTime	resolve_warm_jupyter	18.1 ms	17.3 ms	+5.03%

Tip

Curious why this is faster? Use the CodSpeed MCP and ask your agent.

---

_{Comparing ThiefMaster:tool-list-json (2b9efca) with main (336535f)}

Footnotes

1. 6 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[ThiefMaster]

This fails on windows, not sure where this slash nonsense is coming from, so no idea how to fix it (besides not running these tests on windows which is probably not a good idea)...

       13       │-      "path": "[TEMP_DIR]/tools/flask",
             13 │+      "path": "D:\/uv-tmp\/uv\/tests\/[TMP]/flask",

[ThiefMaster]

Of course this also fails on Windows, because it has -windows- instead of -linux- in the key...