Create puml-theme-spacelab-white

[KingPlus-lang]

No description provided.

[The-Lum]

Hello @KingPlus-lang,
FYI @bschwarz, @arnaudroques,

Thanks to contribute to the PlantUML project, here are some questions or remarks:

1. What is the purpose of your modified theme spacelab-white?
   Is it not better an outline theme instead of a white theme...

2. For traceability, could you just add (or other better sentences..):

• "Adapted by KingPlus-lang from spacelab theme of bschwarz"

on the header of the theme:

'' spacelab-white theme based off of the bootstrap theme of the same name
'' https://bootswatch.com/spacelab/
''
'' Adapted by [KingPlus-lang](https://github.com/KingPlus-lang) 
'' from `spacelab` theme of [bschwarz](https://github.com/bschwarz)
'' Original Author: "Brett Schwarz"
'' Copyright (c) 2020 by Brett Schwarz

3. Then could you change the theme name on line 2 and 8:
   !$THEME = "spacelab"
   to
   !$THEME = "spacelab-white"
   according to the name of the theme and to the filename of the theme...

Regards,
Th.

[The-Lum]

Here are some remarks:

• Add traceability, Author, (e.g. Adapted by X from theme of Y, ...)
• Update theme name on the file

[The-Lum]

Perhaps to change on spacelab-white according to the name of the theme and to the filename of the theme.

[The-Lum]

For traceability, could you just add:

• Adapted by KingPlus-lang from spacelab theme of bschwarz

[The-Lum]

📌 Sorry for all these comments (and their numbers) and the noise... 😱
I discover all the functionality of Github between PR and Commits...

See only my main comment above: #757 (comment)