Syntax Highlighting in IDEs

[ce-bo]

Follow up of #268:

Description

As a Developer, I would like to see in my IDE which elements of the source code of a file have been considered by metric-gardener to calculate a metric.

Developer Notes

• IDE plugin could provide this feature.
• It would be possible to output the start and end text-position of an element in the source code that is counted e.g. by the complexity metric.
• The metric-gardener json output file could be processed by a IDE plugin.
• IDE plugins can somehow do syntax highlighting based on text positions.
• Tree-sitter supports syntax highlighting out of the box. Though, I am not sure if we can use this approach: https://tree-sitter.github.io/tree-sitter/syntax-highlighting