Rename executable and releases to Arduino Cloud Agent

[MatteoPologruto]

Please check if the PR fulfills these requirements

• The PR has no duplicates (please search among the Pull Requests
  before creating one)
• Tests for the changes have been added (for bug fixes / features)

• What kind of change does this PR introduce?

The current name of the Arduino Agent software should be modified to be in line with the name of the Arduino cloud offerings, that is "Arduino Cloud" (instead of Arduino Create). List of things that have been modified:

• Change the name of the application executable (or .app folder)

• Update the "Debug Console"

• Update the README and other documentation in the repository

• Does this PR introduce a breaking change?

No

• Other information:

Test release: https://github.com/arduino/arduino-create-agent/releases/tag/untagged-26461045e3dbac347ae4
PR on the Agent Installer repo: https://github.com/bcmi-labs/arduino-create-agent-installer/pull/28

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 20.04%. Comparing base (da1fa2e) to head (2642545).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #961   +/-   ##
=======================================
  Coverage   20.04%   20.04%           
=======================================
  Files          42       42           
  Lines        2569     2569           
=======================================
  Hits          515      515           
  Misses       1968     1968           
  Partials       86       86           

Flag	Coverage Δ
unit	20.04% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[umbynos]

Could you try to run a test release?
Let's remember to update the wiki documentation too after this change.
Do we need to update the installbuilder configuration?