ODIN_II: Add basic task support

[j-b-1-7]

Description

This PR will add basic support for tasks. Odin II will now be able to parse and process verilog files containing basic implementations of tasks. Can support multiple instances of the same task, or have multiple tasks defined and instantiated by the module. Can parse automatic tasks and functions, but these are not yet handled. Updated function_statement in the bison to prevent things that functions cannot do from passing through. Added support for unconnected ports in module instances.

How Has This Been Tested?

Odin pre-commit
Created new verilog files for tests. I have added three equivalent test cases, simple_task.v, which uses a task, simple_function.v, which uses a function, and simple_module.v, which uses a module, all of which implement the same circuit as the existing verilog test file in operators, twobit_arithmetic_plus.v. All four of these verilog files give the same output blif. These files can also be used in the future, if changes are made to how Odin II handles either module instances, function instances, or task instances, we will be able to use these to ensure the output of all four still yields the same result

Types of changes

• Bug fix (change which fixes an issue)
• New feature (change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My change requires a change to the documentation
• I have updated the documentation accordingly
• I have added tests to cover my changes
• All new and existing tests passed

[jeanlego]

looks like the last PR created some merge conflict.
once those are resolved, could you do a quick review? @ademmings

thanks

[j-b-1-7]

Merge conflicts are resolved, should now be ready for review