Color "Output" view content differently for each output source

[win21H2]

Describe the request

The content displayed in the view has multiple distinct origins, including:

• Stdout from compilation of the sketch
• Stderr from compilation of the sketch
• Stdout from compilation of the sketch's library dependencies
• Stderr from compilation of the sketch's library dependencies
• Stdout from compilation of the sketch's core dependencies
• Stderr from compilation of the sketch's core dependencies
• Stdout from the upload tool
• Stderr from the upload tool

The readability of the output could be futher enhanced by coloring the output from each of these sources (or that is not possible, some logical groups of the sources) differently. This would allow people to easily differentiate what happens for example when it compiled succesfully and is uploading to the board or when there is a code error.

For example:

Code errors: in red text
Library errors: in blue text
Loading to the Arduino board: in green text

Describe the current behavior

In the Arduino IDE "Output" view, output received from the standard error stream (AKA "stderr") is colored differently (with the default theme, in red) than output received from the standard output stream ("stdout"). This makes the output easier to read, and highlights the content which may indicate a problem.

Arduino IDE version

2.0.0-rc3

Additional context

Related

• Display error messages from Compiler and Linker in red... #229