Proposal: dtm develop create-plugin enhancement

[daniel-hutao]

Description

We can now use the dtm develop create-plugin --name=foo command to create a scaffolding for a new plugin. (internal/pkg/develop)

But there are still many points to be optimized. For example, when the plugin name is helm-generic, a helm-generic directory will be created under internal/pkg/, and the corresponding package name is also helm-generic. In fact, we hope that the package name does not contain "-", and the directory name does not. (note: directories in cmd need to have "-", keep same as plugin-name). This is an optimization point.

Of course, if you find other optimization items, you can also optimize them by the way.

[daniel-hutao]

/assign @aeinrw