noncliff: scaffolding for projectrand! for GeneralizedStabilizer

[Fe-r-oz]

This PR sets up the scaffolding for projectrand! in GeneralizedStabilizer, inspired by comments in #355. The goal is to provide clear, well-documented code for readers unfamiliar with the original paper.

I think the work for projectrand! can be divided into the following portions. Work for define _proj and basic tests is underway in #355, and the #418 is being investigated. Segmenting the work in this modular way facilitates future additions and modifications, while also preventing confusion by isolating distinct components.

graph TD
    %% Define subgraph for scaffolding
    subgraph ScaffoldingBranch [ ]
        direction TB
        B[Scaffolding] --> B1[convert expectation to prob <br> randomly choose projection]
    end

    A[projectrand!] --> B
    A --> C[Nitty Gritty]
    C --> C1[define_proj]

    A --> D[Unrelated Errors, <br> Issue #418 ]
    D --> D1[Resolve projection inconsistencies for multi-qubit Stabilizer/MixedDestabilizer ]
   
    A --> E[Testing for Consistency]
    E --> E1[multi-qubit stabilizer <br>multi-qubit pauli <br>non-stabilizer]

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[Krastanov]

this seems like reasonable setup. Do you want this merged first or do you prefer to fill out the scaffolding?

[Fe-r-oz]

I think let's merge this first so that the define_proj can be reviewed separately. Much Appreciated!