DSL2 Module Versioning

[ewels]

Large overview issue to track progress.

• Update nf-core modules install to create / edit a modules.json in the root - Modules lock-file with imported version info #868
• Update nf-core modules lint to check the specific git commit - Update modules lint to check git commit of modules #1114
• Check that nf-core modules lint works with modules.json when checking for new versions - Update modules lint to check git commit of modules #1114
• Update nf-core modules remove to update modules.json - Update modules remove to delete entry in modules.json #1115
• Create nf-core modules update - New cli command: nf-core modules update #1111
• Update nf-core modules list - more meta, show versions for a specific tool

[KevinMenden]

Closing this as all major functionality has now been implemented in dev
What remains is testing, debugging and making adjustments where needed over time.