* Alr.Commands.Edit: update pointer to GNAT Studio release

* Update test.py

* Update user-changes.md

* Update user-changes.md

* Speed-up detection of installed externals in RPM distros

Although the yum/dnf wrappers are needed for the installation proper, we can
speed up detections of already installed packages by using rpm directly.
Unfortunately, rpm cannot give info on not installed packages, but this still
speeds up things greatly for the usual case of gnat/gprbuild being installed.

* Refactor duplicated code

* Fix early parsing of verbosity switches

We were recognizing them even after the subcommand. This also meant that it
would have been impossible to have regular output if a -v is intended for the
subcommand, e.g. in `alr exec -- whatever -v`.

* Bump/sync clic submodule/dependency

This switch was always added to the init crates and should have been
included in the first version of build profiles. The warnings are only
displayed for embedded project based on run-times without exception
propagation, and can be very annoying.

Alire.Utils.Switches: Disable No_Exception_Propagation warning

This switch was always added to the init crates and should have been
included in the first version of build profiles. The warnings are only
displayed for embedded project based on run-times without exception
propagation, and can be very annoying.

Bump alr and index versions to 1.2

* Fix retrieval of git root and prefix inside repo

* Fix instantiation on older compilers

* Alire.VSSs.Git: Fix unreferenced parameter

* Alire.Publish: fix reversed logic

* Code review fixes

Co-authored-by: GHA <actions@github.com>

* Alr.Commands.Get: New --dirname switch

This switch just shows in which folder the just downloaded crate can be found.

* Tests for `alr get --dirname`

Co-authored-by: GHA <actions@github.com>

* Create asset for full sources with submodules

* No need to run in multiple OSes

Co-authored-by: GHA <actions@github.com>

Fixes #1011

Co-authored-by: GHA <actions@github.com>

* Load the index when dependencies are needed

* Test for this fix

Co-authored-by: GHA <actions@github.com>

Co-authored-by: GHA <actions@github.com>

Co-authored-by: GHA <actions@github.com>

* Add a new --version standalone switch

* Add a couple of new tests

* Alire.Index_On_Disk: Drop index cache after deletion

Also ensure that all index addition functions operate with fresh index
information

* Bump index version

* Allow disabling the "old compatible index" warning

Also use real old compatible version to not have to use a fake old compatible version

* Alire.Config.Edit: fix copypasta mistake

Co-authored-by: GHA <actions@github.com>

Also ensure that all index addition functions operate with fresh index
information

Co-authored-by: GHA <actions@github.com>

* Make index set its own type

* Basics for individual crate loading in place

* Complete single crate loading and use in `show`

* Use Empty_Set instead of Empty for older compilers

Note that gprinstall won't complain if this folder doesn't exists, so
users can decided to leave it empty or remove it in case they don't have
resources.

* Update getting-started.md

* Update getting-started.md

* Alire.Properties.Configurations: revert forced mixed case

Forcing mixed case for enum values breaks existing crates (atomic).

* Alire.Crate_Configuration: force build profiles to lower case

The default is upper case because values are generated from Enum'Img.

The Alire.Features.* hierarchy was ill-conceived so getting rid of it by moving
a package around.

* New 'action' subcommand, listing supported

* Alr.Commands.Action: Add execution of given action

* Add tests for action listing and triggering

* doc/user-changes.md: document new `alr action`

* Self-review fixes

pragma No_Elaboration_Code_All has an impact on implicitly or explicitly with’ed units:
https://docs.adacore.com/gnat_rm-docs/html/gnat_rm/gnat_rm/implementation_defined_pragmas.html

The first argument of gnatcov must be the action (`instrument`, `coverage`, etc.).

This was probably too aggressive as contracts severely impact performances.