Updating ww-vc-trio to comply with WILDS guidelines

[tefirman]

Description

Performing a slight structural revamp of this repository in preparation for the WILDS WDL go-live to align with WILDS guidelines. Also needed to slightly modify the script functionality to operate properly within the context of Docker containers. Script was successfully validated via PROOF using realistic sequencing data. The major updates are as follows:

• Adding governance and template files according to Scott's templates
• Updating WDL script formatting according to WILDS guidelines
• Adjusting the tasks to use Docker containers instead of Rhino modules
• Adding WOMtool validate GitHub Action to execute as a check during every pull request

Still to Come

• Add parameter_meta sections on the workflow/functions
• Update variable names to comply with casing style for WILDS WDL's