feat: install and run madge

[Kendric285]

To install madge:
Run npm install --save-dev madge
Run npx madge --circular . > madge-output.txt
madge-output.txt is a text file containing the output from the tool.

Pros:
Can detect circular dependencies between modules, which can make code harder to maintain and reason about
Provides insight into the dependency structure of the project, helping developers understand relationships between files
Fast to run and produces output quickly even on larger JavaScript projects
Does not require writing tests

Cons:
Focuses only on module dependency structure and therefore does not detect logic errors
For large projects like NodeBB, the dependency graph can become large and difficult to interpret without additional filtering, configuration, or visualization tools
May report circular dependencies that are intentional in the project, requiring manual review to determine whether they are actually problematic