Document the reasons why duplicate namespace error can occur #2028
Description
Describe your issue
Duplicate namespace "Button123456789" found in multiple different resources:
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This issue indicates multiple versions of the same library in the compilation, or different paths importing the same stylesheet like: "esm" or "cjs".
Stylable emits this error but does not give a clear way for how to solve/investigate the problem.
This is because usually the solution is not in the Stylable domain and related to package (npm) composition and build strategies.
Since we don't want to explode the error message with text. We can create a page in Stylable.io explaining this error (and maybe all the errors), then we can just give an additional link in the error description that will give extra information for the next steps.
Additional Context
No response