IDE2 styles contain hard coded color constants

[kittaakos]

Describe the problem

Although themes are supported in IDE2, some of the styles and colors are hard-coded. Colors should be derived from themes, if IDE2 needs something additional, a color contribution has to be defined and used.

arduino-ide/arduino-ide-extension/src/browser/style/certificate-uploader-dialog.css

Lines 39 to 47 in d24a391

	.certificate-uploader-dialog .success {
	display: flex;
	align-items: center;
	color: #1DA086;
	}
	.certificate-uploader-dialog .warn {
	color: #C11F09;
	}

Theia also defines error, warn, info. E.g --theia-errorForeground.

To reproduce

See the description.

Expected behavior

IDE2 does not come with hard-coded color constants

Arduino IDE version

d24a391

Operating system

N/A

Operating system version

N/A

Additional context

No response

Issue checklist

• I searched for previous reports in the issue tracker
• I verified the problem still occurs when using the latest nightly build
• My report contains all necessary details