docs: Move docstrings from ext to public

Author: ErikQQY

lib/NonlinearSolveBase/ext/NonlinearSolveBaseForwardDiffExt.jl

@@ -191,12 +191,6 @@ NonlinearSolveBase.nodual_value(x) = x
 NonlinearSolveBase.nodual_value(x::Dual) = ForwardDiff.value(x)
 NonlinearSolveBase.nodual_value(x::AbstractArray{<:Dual}) = map(ForwardDiff.value, x)
 
-"""
-    pickchunksize(x) = pickchunksize(length(x))
-    pickchunksize(x::Int)
-
-Determine the chunk size for ForwardDiff and PolyesterForwardDiff based on the input length.
-"""
 @inline NonlinearSolveBase.pickchunksize(x) = pickchunksize(length(x))
 @inline NonlinearSolveBase.pickchunksize(x::Int) = ForwardDiff.pickchunksize(x)
 

lib/NonlinearSolveBase/src/public.jl

@@ -12,6 +12,13 @@ function nonlinearsolve_∂f_∂p end
 function nonlinearsolve_∂f_∂u end
 function nlls_generate_vjp_function end
 function nodual_value end
+
+"""
+    pickchunksize(x) = pickchunksize(length(x))
+    pickchunksize(x::Int)
+
+Determine the chunk size for ForwardDiff and PolyesterForwardDiff based on the input length.
+"""
 function pickchunksize end
 
 # Nonlinear Solve Termination Conditions