bundle the npm run clean-css command along with npm start

Is your feature request related to a problem? Please describe.
no

Describe the solution you'd like
run both the commands npm run compile and npm run clean-css (which would look for changes in sbuttons.css) simultaneously with the command npm start which would indeed facilitate faster development.

Additional notes
I would like to work on this.

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Hi @mrSidSat that's a nice suggestion.

I think instead of changing start we should add a new script build which would perform both commands.

You need to also change the contributing guidelines in this part:

sbuttons/CONTRIBUTING.md

Lines 47 to 50 in d423a5c

    
              2. Compile command: 
        
                 `npm run compile` 
        
              3. Clean CSS command: 
        
                 `npm run clean-css`

Replace it with just using the new build command.

I'll assign you for this

@shahednasser reporting a stale issue.

	2. Compile command:
	`npm run compile`
	3. Clean CSS command:
	`npm run clean-css`