feat: add middleware scaffold

[juliano-soares]

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PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Other... Please describe:

What is the current behavior?

Currently the CLI does not have a command to create the Middleware Scaffold

Issue Number: #32

What is the new behavior?

A new command has been added to create the middleware scaffold, the command "expressots g m myMiddleware". The existing command to create a module has been changed from "expressots g m myModule" to "expressots g mo myModule".

Does this PR introduce a breaking change?

• Yes
• No

If this PR contains a breaking change, please describe the impact and migration path for existing applications below.

Other information

Any other information that is important to this PR.