feat: add zio-actors-sharding

[ffakenz]

Description

The idea is to take advantage of the shardcake architecture to leverage zio-actors-persistence into distributed entities following the single writer principle.

We delegate the responsibility of location transparency to shardcake instead of remote actor refs, thus all messages are expected to be handle only by local actor refs running on the receiver node.

Changes

🍀 Add base draft project

• to contain code potentially common or reusable.

🍀 Add a basic example following:

• https://zio.github.io/zio-actors/docs/overview/overview_persistence
• https://devsisters.github.io/shardcake/docs/#an-example
• Reuses existing ShoppingCart persistence example

⚠️ the example was not added to the examples module due to a cats-effect incompatibility version
between doobie (v0.13.4) and redis4cats (v1.2.0)

Extras

🍀 Upgrade sbt version

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