Make Callbacks easier to use and create

[kMutagene]

Using the Callback constructor is kinda tedious, especially for large functions. There are multiple reasons for this, for example the convoluted way of creating Dependency (via CallbackOutput.create or CallbackInput.create). Here are some steps that i identified to help with this:

• Use multiple overloads, e.g. for callbacks that only take one input, one output, and multiple of both (66ba10d)
• Add custom operators for dependency (CallbackOutput/Input) creation (a75eac6)
• Add component property DSL for autocompletion of component properties when defining dependencies (Add DSL for Component Properties #8)
• Add a callback computation expression (Consider computation expressions for callbacks #9)