Add scheduling, machine info, caching strategies and devices (#9)

Reviewed-on: Rubydragon/MetagraphOptimization.jl#9
Co-authored-by: Anton Reinhard <anton.reinhard@proton.me>
Co-committed-by: Anton Reinhard <anton.reinhard@proton.me>

src/devices/detect.jl

@@ -0,0 +1,23 @@
+
+"""
+    get_machine_info(verbose::Bool)
+
+Return the [`Machine`](@ref) currently running on. The parameter `verbose` defaults to true when interactive.
+"""
+function get_machine_info(; verbose::Bool = Base.is_interactive)
+    devices = Vector{AbstractDevice}()
+
+    for device in device_types()
+        devs = get_devices(device, verbose = verbose)
+        for dev in devs
+            push!(devices, dev)
+        end
+    end
+
+    noDevices = length(devices)
+    @assert noDevices > 0 "No devices were found, but at least one NUMA node should always be available!"
+
+    transferRates = Matrix{Float64}(undef, noDevices, noDevices)
+    fill!(transferRates, -1)
+    return Machine(devices, transferRates)
+end