allow disabling crud actors generation

[xmonader]

[development_crud_disable] for packages in tfgrid it's not right to allow crud actors to manipulate data in there without proper permissions or without an option at least to disable the generation

[xmonader]

@zaibon @despiegk

[ranatrk]

Added disable option for crud actors to disable generation of actors. This option can be used by adding to disable_crud = true in the package's package.toml file. https://github.com/threefoldtech/jumpscaleX_core/commit/52ce2a6a29698dbdf4d5dc2b281f1ea661d8d399

[despiegk]

do we have some doc somewhere?

[despiegk]

lets close today

[ranatrk]

do we have some doc somewhere?

No, ill add some documentation for how to use it

[siddiquagig]

Verified

Steps followed:

• Find/create a package with models directory, with a model in a toml file

you can use this package /sandbox/code/github/threefoldtech/jumpscaleX_threebot/ThreeBotPackages/zerobot/webplatform

• include in the package.toml source section disable_crud=true

• load the package from within the shell

• When trying to access the actors, there will be no actors generated for the crud models only the normal package actors

• To test the other way around on a clean environment, remove the disable option, and try the steps again but this time the actors will be generated for that package