Update setup anb Signal class

Signal class update:

• Rebase on the Pydantic library to have the plot and check the inputs.
• Signal class is allowed to processing cantools named signals class.

Setup:

• Added co2mpas as a mandatory dependency.
• Added pydantic and cantools as dependencies for Signal class.

Others:

• Fix typos in the code.
• Update import libraries and delte duplicates.
• Reformat variable namings.
• Fix documentation errors and typos.