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/node/create.jl

@@ -1,44 +1,20 @@
 
-DataTaskNode(t::AbstractDataTask, name = "") = DataTaskNode(
-    t,
-    Vector{Node}(),
-    Vector{Node}(),
-    UUIDs.uuid1(rng[threadid()]),
-    missing,
-    missing,
-    missing,
-    name,
-)
+DataTaskNode(t::AbstractDataTask, name = "") =
+    DataTaskNode(t, Vector{Node}(), Vector{Node}(), UUIDs.uuid1(rng[threadid()]), missing, missing, missing, name)
 ComputeTaskNode(t::AbstractComputeTask) = ComputeTaskNode(
-    t,
-    Vector{Node}(),
-    Vector{Node}(),
-    UUIDs.uuid1(rng[threadid()]),
-    missing,
-    missing,
-    Vector{NodeFusion}(),
+    t,                              # task
+    Vector{Node}(),                 # parents
+    Vector{Node}(),                 # children
+    UUIDs.uuid1(rng[threadid()]),   # id
+    missing,                        # node reduction
+    missing,                        # node split
+    Vector{NodeFusion}(),           # node fusions
+    missing,                        # device
 )
 
 copy(m::Missing) = missing
-copy(n::ComputeTaskNode) = ComputeTaskNode(
-    copy(n.task),
-    copy(n.parents),
-    copy(n.children),
-    UUIDs.uuid1(rng[threadid()]),
-    copy(n.nodeReduction),
-    copy(n.nodeSplit),
-    copy(n.nodeFusions),
-)
-copy(n::DataTaskNode) = DataTaskNode(
-    copy(n.task),
-    copy(n.parents),
-    copy(n.children),
-    UUIDs.uuid1(rng[threadid()]),
-    copy(n.nodeReduction),
-    copy(n.nodeSplit),
-    copy(n.nodeFusion),
-    n.name,
-)
+copy(n::ComputeTaskNode) = ComputeTaskNode(copy(n.task))
+copy(n::DataTaskNode) = DataTaskNode(copy(n.task), n.name)
 
 """
     make_node(t::AbstractTask)