Add a few "See also" entries to typemax and friends (#57759)

I would find it helpful to find the names of the related float max
functions from another's docstring.

I kept `maxintfloat` in the `floatmin` and `typemin` docstrings since
there is no `minintfloat` and I still think it would be helpful to have
it there. I also fixed and example in the `typemin` docstring to be
consistent with the `typemax` example.

Author: christiangnrd

base/float.jl

@@ -995,6 +995,8 @@ end
 Return the smallest positive normal number representable by the floating-point
 type `T`.
 
+See also: [`typemin`](@ref), [`maxintfloat`](@ref), [`floatmax`](@ref), [`eps`](@ref).
+
 # Examples
 ```jldoctest
 julia> floatmin(Float16)
@@ -1014,7 +1016,7 @@ floatmin(x::T) where {T<:AbstractFloat} = floatmin(T)
 
 Return the largest finite number representable by the floating-point type `T`.
 
-See also: [`typemax`](@ref), [`floatmin`](@ref), [`eps`](@ref).
+See also: [`typemax`](@ref), [`maxintfloat`](@ref), [`floatmin`](@ref), [`eps`](@ref).
 
 # Examples
 ```jldoctest

base/floatfuncs.jl

@@ -26,6 +26,8 @@ That is, `maxintfloat` returns the smallest positive integer-valued floating-poi
 `n` such that `n+1` is *not* exactly representable in the type `T`.
 
 When an `Integer`-type value is needed, use `Integer(maxintfloat(T))`.
+
+See also: [`typemax`](@ref), [`floatmax`](@ref).
 """
 maxintfloat(::Type{Float64}) = 9007199254740992.
 maxintfloat(::Type{Float32}) = Float32(16777216.)

base/int.jl

@@ -748,7 +748,7 @@ promote_rule(::Type{UInt128}, ::Type{Int128}) = UInt128
 
 The lowest value representable by the given (real) numeric DataType `T`.
 
-See also: [`floatmin`](@ref), [`typemax`](@ref), [`eps`](@ref).
+See also: [`floatmin`](@ref), [`maxintfloat`](@ref), [`typemax`](@ref), [`eps`](@ref).
 
 # Examples
 ```jldoctest
@@ -764,8 +764,11 @@ julia> typemin(Float16)
 julia> typemin(Float32)
 -Inf32
 
-julia> nextfloat(-Inf32)  # smallest finite Float32 floating point number
--3.4028235f38
+julia> floatmin(Float32)  # smallest positive finite Float32 floating point number
+1.1754944f-38
+
+julia> nextfloat(-Inf32) == -floatmax(Float32)  # equivalent ways of getting the lowest finite Float32 floating point number
+true
 ```
 """
 function typemin end
@@ -775,7 +778,7 @@ function typemin end
 
 The highest value representable by the given (real) numeric `DataType`.
 
-See also: [`floatmax`](@ref), [`typemin`](@ref), [`eps`](@ref).
+See also: [`floatmax`](@ref), [`maxintfloat`](@ref), [`typemin`](@ref), [`eps`](@ref).
 
 # Examples
 ```jldoctest
@@ -791,7 +794,7 @@ Inf
 julia> typemax(Float32)
 Inf32
 
-julia> floatmax(Float32)  # largest finite Float32 floating point number
+julia> floatmax(Float32)  # largest positive finite Float32 floating point number
 3.4028235f38
 ```
 """