feat: allow ImperativeAffect to accept callable structs

Author: AayushSabharwal

src/systems/imperative_affect.jl

@@ -38,7 +38,7 @@ in the returned tuple, in which case the associated field will not be updated.
     skip_checks::Bool
 end
 
-function ImperativeAffect(f::Function;
+function ImperativeAffect(f;
         observed::NamedTuple = NamedTuple{()}(()),
         modified::NamedTuple = NamedTuple{()}(()),
         ctx = nothing,
@@ -48,18 +48,18 @@ function ImperativeAffect(f::Function;
         collect(values(modified)), collect(keys(modified)),
         ctx, skip_checks)
 end
-function ImperativeAffect(f::Function, modified::NamedTuple;
+function ImperativeAffect(f, modified::NamedTuple;
         observed::NamedTuple = NamedTuple{()}(()), ctx = nothing, skip_checks = false)
     ImperativeAffect(
         f, observed = observed, modified = modified, ctx = ctx, skip_checks = skip_checks)
 end
 function ImperativeAffect(
-        f::Function, modified::NamedTuple, observed::NamedTuple; ctx = nothing, skip_checks = false)
+        f, modified::NamedTuple, observed::NamedTuple; ctx = nothing, skip_checks = false)
     ImperativeAffect(
         f, observed = observed, modified = modified, ctx = ctx, skip_checks = skip_checks)
 end
 function ImperativeAffect(
-        f::Function, modified::NamedTuple, observed::NamedTuple, ctx; skip_checks = false)
+        f, modified::NamedTuple, observed::NamedTuple, ctx; skip_checks = false)
     ImperativeAffect(
         f, observed = observed, modified = modified, ctx = ctx, skip_checks = skip_checks)
 end