Define Variables
In Paral, variables should be defined at the start of the file before any tasks.
They can hold values like strings, numbers, booleans, lists, matrices, durations, or null.
Basic Syntax
A variable is defined with the form:
name = value
a_string = "this is a string"
a_list = [0, 1]
a_matrix = ["ubuntu", "fedora"]::["amd64", "arm64"]
an_int_number = 100
a_float_number = 10.0
a_boolean = true # or false
a_duration = 5s # or 5, 2m, 10h, 30d
a_null = hich # or HICH