Support for `.jar` files in tasks and debugger

[lukejans]

I’m not sure how the maintainers would like to implement this, but it would be great to have support for .jar files without any configuration or at least some mention of it in the documentation for this extension. Below is an example of the Zed settings files I’ve created to make jar files work in my project. I haven’t done much research on this, but I just wanted to get the conversation started. I’m also not sure if using a lib/ folder is better, but here’s the current project structure:

./
├── .zed/
│   ├── debug.json
│   ├── settings.json
│   └── tasks.json
├── MyJar.jar
├── bin/
└── src/
    ├── Main.java
    └── ExampleFile.java

// .zed/debug.json
[
    {
        "label": "Debug $ZED_STEM",
        "adapter": "Java",
        "request": "launch",
        "mainClass": "$ZED_STEM",
        "build": {
            "command": "javac -cp $ZED_WORKTREE_ROOT/MyJar.jar -d $ZED_WORKTREE_ROOT/bin $ZED_WORKTREE_ROOT/src/*.java",
            "shell": {
                "with_arguments": {
                    "program": "/bin/sh",
                    "args": ["-c"],
                },
            },
        },
    },
]

// .zed/settings.json
{
    "lsp": {
        "jdtls": {
            "initialization_options": {
                "project": {
                    "sourcePaths": ["src"],
                },
                "settings": {
                    "java": {
                        "project": {
                            "referencedLibraries": ["MyJar.jar"],
                        },
                    },
                },
            },
        },
    },
}

// .zed/tasks.json
[
    {
        "label": "Run Main with jar",
        "command": "find . -name '*.java' -not -path './bin/*' -print0 | xargs -0 javac -cp MyJar.jar -d bin && java -cp 'bin:MyJar.jar' Main",
        "use_new_terminal": false,
        "reveal": "always",
        "shell": {
            "with_arguments": {
                "program": "/bin/sh",
                "args": ["-c"],
            },
        },
    },
]