Use code blocks for inline commands

[josill]

Summary

Convert inline command examples to code blocks so they have copy buttons, making it easier for users to copy commands.

Basic example

Current (quick-start.adoc):

So for doing so, please execute the following command:

1. To see what would change: `updatecli diff --config manifest.yaml`
2. To apply the change: `updatecli apply --config manifest.yaml`
3. To see that nothing needs to be changed anymore: `updatecli apply --config manifest.yaml`

Proposed:

So for doing so, please execute the following commands:

1. To see what would change:

[source,shell]
----
updatecli diff --config manifest.yaml
----

2. To apply the change:

[source,shell]
----
updatecli apply --config manifest.yaml
----

3. To see that nothing needs to be changed anymore:

[source,shell]
----
updatecli apply --config manifest.yaml
----

Motivation

Why are we doing this? The website already has copy button functionality that automatically adds copy buttons to code blocks (<pre> elements), but commands displayed as inline code (backticks) don't get copy buttons. Users must manually select text, which is error-prone.

What use cases does it support? Users following tutorials and guides need to copy commands accurately. Code blocks with copy buttons reduce errors and improve the experience, especially on mobile devices.

What is the expected outcome? All command examples are displayed in code blocks with copy buttons, providing a consistent and easier way to copy commands throughout the documentation.