[Lang Enhancement Proposal] Implementation of namespaces using `namespace NAME { }`

[Luna-Klatzer]

Affected area by change:

• Language Syntax: yes
• Language Library (Parac Base Library): no
• Compiler: yes
• Pre-Processor: no
• Documentation: yes

Short Introduction and Summary
Implement namespaces for mangling variable names and differentiate variable names in one or more files.

Is your request related to a problem? Please describe.

Currently, with the planned implementation of name mangling, namespaces will have to be implemented in a certain way, to allow for
easier differentiation in files.

Describe the solution you'd like

Implement the keyword namespace, like the following:

namespace section {
   int variable = 3;
}

To access the variable variable, the namespace will have to be used as the parent identifier, like in the struct syntax:

section.variable // Accessing the namespace and its child variable

Describe alternatives you've considered

None.

Additional context

None.