add dlv launch debug config

see:

this in discord: bubbletea debug
How to debug Bubble Tea applications in Visual Studio Code

The following is a starting point for launch.json config:

    {
        "label": "Run headless dlv",
        "type": "process",
        "command": [
            "dlv"
        ],
        "args": [
            "debug",    
            "--headless",
            "--listen=:2345",
            "--api-version=2",
            "${workspaceFolder}/cmd/cli",
            "-- arg1=true -host=foo.com",
        ],
        "isBackground": true,
        "problemMatcher": {
            "owner": "go",
            "fileLocation": "relative",
            "pattern": {
                "regexp": "^couldn't start listener:"
            },
            "background": {
                "activeOnStart": true,
                "beginsPattern": "^API server listening at:",
                "endsPattern": "^Got a connection, launched process"
            }
        }
    }

this is equivalent to running this on the command line:

dlv debug --headless --listen=:2345 . -- /Users/plastikfan/dev/test --profile blur --files "wonky*" --dry-run

but note that the path containing the workspace folder needs to be changed to point at the main.go program in pixa

You will probably need multiple entries as arguments need to be hard-coded into each each entry.

snivilised / pixa

add dlv launch debug config #165