Explore showing multiline decorations

[usernamehw]

Try finding a space to fit as much text as possible (Tetris).

Whether it's a very long single line problem, or a multiline problem => find the best empty box to fit it (using multiple single line decorations).

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• [x] Highlight line where problem is from (since it's rendered in random position in the viewport)
• [ ] Closest problem multiline; doesn't calculate the best position properly atm
• [ ] Closest problem multiline by severity (error before warning)
• [ ] Closest problem multiline in viewport
• [ ] Align multiline message
• [ ] Split single-line long error into multiple lines
• [ ] Option to show multiple multiline error or an option to render as usual (all errors) if there are no multiline/long errors
• [ ] Show multiple problems from 1 line

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How to enable and configure experimental version:

"errorLens.followCursor": "closestProblemMultiline",
"errorLens.multilineMessage": {
    "decorationMaxNumberOfLines": 4,
    "preferFittingMessageMultiplier": 2,
    "highlightProblemLine": "line",
    "alignStart": 0,
    "alignEnd": 0,
    "margin": 4,
    "padding": 1,
    "borderRadius": "",
    "useFixedPosition": true,
},

[goyalyashpal]

hi! thanks for such a wonderful extension and including this on open-vsx too.

is this issue just about showing single but long diagnostic line or would also cover multiple diagnostic messages for same line??

e.g.:

Syntax error, insert "VariableDeclarators" to complete LocalVariableDeclaration [21:17]
Syntax error, insert ";" to complete LocalVariableDeclarationStatement [21:17]