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                        refactor(linear_algebra/clifford_algebra): relax typeclasses to semiring
This generalization isn't motivated by any particular result or generalization in the literature; rather, it's motivated by allowing exterior_algebra R M to be redefined as clifford_algebra 0, as this prevents all the results having to be duplicated.
- [x] depends on: #14303
See also #14819
This PR/issue depends on:
- ~~leanprover-community/mathlib#14303~~ By Dependent Issues (🤖). Happy coding!