add custom vcl endpoints

[Integralist]

• fastly vcl custom create
• fastly vcl custom delete
• fastly vcl custom describe
• fastly vcl custom list
• fastly vcl custom update

[phamann]

Whats the reasoning for nesting this under a fastly vcl custom namespace and not fastly vcl create etc? I ask as this breaks convention and the UX defined elsewhere in the project.

[Integralist]

Whats the reasoning for nesting this under a fastly vcl custom namespace

@phamann because in the near future we will also have...

• fastly vcl cache-settings create
• fastly vcl cache-settings delete
• fastly vcl cache-settings describe
• fastly vcl cache-settings list
• fastly vcl cache-settings update
• fastly vcl condition create
• fastly vcl condition delete
• fastly vcl condition describe
• fastly vcl condition list
• fastly vcl condition update
• fastly vcl custom create [--main]
• fastly vcl custom delete
• fastly vcl custom describe
• fastly vcl custom list
• fastly vcl custom update [--main]
• fastly vcl diff
• fastly vcl gzip create
• fastly vcl gzip delete
• fastly vcl gzip describe
• fastly vcl gzip list
• fastly vcl gzip update
• fastly vcl header-object create
• fastly vcl header-object delete
• fastly vcl header-object describe
• fastly vcl header-object list
• fastly vcl header-object update
• fastly vcl request-settings create
• fastly vcl request-settings delete
• fastly vcl request-settings describe
• fastly vcl request-settings list
• fastly vcl request-settings update
• fastly vcl response-object create
• fastly vcl response-object delete
• fastly vcl response-object describe
• fastly vcl response-object list
• fastly vcl response-object update
• fastly vcl settings describe
• fastly vcl settings update
• fastly vcl snippet create
• fastly vcl snippet delete
• fastly vcl snippet describe
• fastly vcl snippet list
• fastly vcl snippet update

[kailan]

Reviewed over Zoom with @Integralist – this PR is great and lays some important groundwork for the upcoming command phases!

🚀