Remove _t suffixes from public types

Rename header-scope aliases, enums, and helper types while retaining descriptive names where dropping the suffix would create a collision.

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src/ifcgeom/kernels/manifold/manifold_kernel.cpp

@@ -1470,7 +1470,7 @@ namespace {
 		return bbox;
 	}
 
-	std::optional<manifold::Manifold> boolean_result_from_operands(const std::vector<manifold::Manifold>& operands, taxonomy::boolean_result::operation_t operation) {
+	std::optional<manifold::Manifold> boolean_result_from_operands(const std::vector<manifold::Manifold>& operands, taxonomy::boolean_result::operation_type operation) {
 		if (operands.empty()) {
 			return std::nullopt;
 		}