[Feature] VCL analayzer/optimizer

[ysugimoto]

Kind of proposals

You can turn on multiple checkboxes.

• [] Parser
• [] Linter
• [] Simulator
• [] Testing
• etc

Describe the feature

Some projects in the real world have huge steps of VCL and then it makes developers hard to maintain.
To improve and help them, we want to provide a feature that VCL code analyzer/optimizer to be useful for refactoring their VCLs.

I'm thinking provide some indexes so far:

• Cyclomatic Complexity
• Code Duplication
• Lines of Code
• Unit test Coverage (probably this should be done in unit testing)

It should be the same like lizard - python code complexity analyzer, and should be run as:

falco analyze [vcl file]

Needs to consider how output should be (CLI table, JSON, etc)