Add drawBoldTextInBrightColors setting

[comicchang]

This PR adds a option to set drawBoldTextInBrightColors to xterm.js.

This should resolve #5361 #2836 ##973

Example hyper.json

{
  "$schema": "./schema.json",
  "config": {
    "drawBoldTextInBrightColors": false,
    "colors": {
      "black": "#073642",
      "red": "#dc322f",
      "green": "#859900",
      "yellow": "#b58900",
      "blue": "#268bd2",
      "magenta": "#d33682",
      "cyan": "#2aa198",
      "white": "#eee8d5",
      "lightBlack": "#586e75",
      "lightRed": "#cb4b16",
      "lightGreen": "#586e75",
      "lightYellow": "#657b83",
      "lightBlue": "#839496",
      "lightMagenta": "#6c71c4",
      "lightCyan": "#93a1a1",
      "lightWhite": "#fdf6e3",
      "limeGreen": "#32CD32",
      "lightCoral": "#F08080"
    },
...
  },
...
}

current master
or
this PR with drawBoldTextInBrightColors: true

this PR with drawBoldTextInBrightColors: false

[LabhanshAgrawal]

Thanks for the contribution, the new config structure is not fully finalized, I'm thinking of grouping some xterm related options in a separate key. I'll keep this pr open till the structure is finalized and then we can work on getting this merged.

[weiqisun]

Hi, I just want to follow up on this thread. Is the new config structure fully finalized now so that this configuration option can be added? I tested the changes in this PR (with some minor modifications) on my local branch and it worked as expected. It will be great to have this feature in the released version so that I don't have to run my local build. Thanks!

[weiqisun]

Thanks @comicchang for making this work! Just a minor comment regarding the code.

[comicchang]

@weiqisun Thanks for your comment, fixed.