docs: add first introduction part (Aggregate Programming)

[Danix002]

Site introduction implementation

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 69.51%. Comparing base (fcb0da7) to head (72e9dd6).

Additional details and impacted files

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  Coverage   69.51%   69.51%           
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  Lines         561      561           
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  Hits          390      390           
  Misses        134      134           
  Partials       37       37           

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[angelacorte]

@Danix002 I suggest not to close PRs, just leave it open and when you'll add a commit on your branch it will refresh automatically.
Or were there other motivations to close it?

[Danix002]

There is no reason, i made a mistake. Thank you."

[DanySK]

I would suggest organizing the docs with the DIVIO framework

[nicolasfara]

I would suggest organizing the docs with the DIVIO framework

I've structured the documentation in that way, following: https://docs.divio.com/documentation-system/

[angelacorte]

Suggested change

	In this context, **aggregate programming**[<sup>1</sup>](#bibliography) (AP) emerges as a **relevant macroprogramming approach**. It is based on the **functional composition** of **reusable collective behavior blocks**, with the goal of efficiently achieving **complex** and **resilient behaviors** in **dynamic networks**.
	In this context, **Aggregate Programming**[<sup>1</sup>](#bibliography) (AP) emerges as a **relevant macroprogramming approach**. It is based on the **functional composition** of **reusable collective behavior blocks**, with the goal of efficiently achieving **complex** and **resilient behaviors** in **dynamic networks**.

[angelacorte]

The cited paper is not the correct reference to the Vascular Morphogenesis work, this is the correct one.

[angelacorte]

I think this sentence doesn't seem appropriate in this position. Please clarify the concepts written here and put it at the end of this paragraph.

Also, it is not clear about which layer you're writing about, the second from the top or the bottom?

[angelacorte]

Suggested change

	A key abstraction provided by **Field Calculus** is the notion of a *field*, inspired by physical phenomena. In this abstraction, each networked device contributes a local value, forming a distributed structure over the system. For example, temperature sensors might define a field of ambient temperature values, while smartphones might contribute fields of movement directions or displayed notifications.
	A key abstraction provided by **Field Calculus** is the notion of a *field*, inspired by physical phenomena.
	In this abstraction, each networked device contributes a local value, forming a distributed data structure over the system. This data structure represents a mapping from devices to values, enabling decentralized computations that produce globally coordinated behaviors.
	For example, temperature sensors might define a field representing ambient temperature values, while smartphones might contribute fields representing movement directions or displayed notifications.

[angelacorte]

Suggested change

	These constructs together form the building blocks for creating robust and flexible aggregate behaviors.
	Together, these constructs enable the creation of robust and flexible behaviors that emerge from the aggregation of local device interactions and computations.

[angelacorte]

Molecules and relative concentrations are strictly related to the Alchemist Simulator.
In the Collektive first-steps documentation, try to avoid them as much as possible because the tool should potentially run also outside the Alchemist environment.

[angelacorte]

Use the suggestions above to fix this code.

[angelacorte]

Explain better what can be observed by the image.

[angelacorte]

The network is too dense and displaying the connections in such a network is hard to understand.
It would be better to reduce its density first and then show the connections.

[angelacorte]

When displaying example images, provide a brief description of what can be seen in them.