Implementation of the Hover feature

[osman362]

The Goal

This pull request introduces the hover information functionality of the Language Server Protocol for Modelica. The goal of this feature is to provide users with detailed information about Modelica classes, including descriptions, inputs, outputs, and parameters, directly within the hover pop-up interface.

Implementation Details

• Hover Information Extraction: I developed utility functions that are extracting relevant information for classes, inputs, outputs, and parameters. This involved navigating the AST to identify description_string nodes for descriptions and component_clause nodes and their children checking if they include the keywords input, output, parameter (as we can't differentiate these in the AST) for declarations.
• Markdown Formatting: The extracted information is presented in a readable and structured format by using Markdown. This includes the class description, inputs, outputs, and parameters, each formatted within blocks for clarity.

What Follows Next

• Unit Testing: Integration of unit tests to ensure the reliability and correctness of the implemented hover information feature.
• Additional Features: Including more detailed documentation, examples of usage, or references to Modelica documentation.

[AnHeuermann]

The basics are working now.
The only remaining thing I would like to add is the ability to find definitions with fully qualified names.

E.g. from the DrumBoilder example I would like to get velocityOfSound_ph documentation in every location.