Add documentation to every function and automatic doc html building (#6)

Reviewed-on: Rubydragon/MetagraphOptimization.jl#6
Co-authored-by: Anton Reinhard <anton.reinhard@proton.me>
Co-committed-by: Anton Reinhard <anton.reinhard@proton.me>

docs/make.jl

@@ -0,0 +1,29 @@
+using Documenter
+using MetagraphOptimization
+
+makedocs(
+    #format = Documenter.LaTeX(platform=""),
+
+    root = "docs",
+    source = "src",
+    build = "build",
+    clean = true,
+    doctest = true,
+    modules = Module[MetagraphOptimization],
+    repo = "https://code.woubery.com/Rubydragon/MetagraphOptimization.jl/src/branch/{commit}{path}#L{line}",
+    sitename = "MetagraphOptimization.jl",
+    pages = [
+        "index.md",
+        "Manual" => "manual.md",
+        "Library" => [
+            "Graph" => "lib/internals/graph.md",
+            "Node" => "lib/internals/node.md",
+            "Task" => "lib/internals/task.md",
+            "Operation" => "lib/internals/operation.md",
+            "Models" => "lib/internals/models.md",
+            "Diff" => "lib/internals/diff.md",
+            "Utility" => "lib/internals/utility.md",
+        ],
+        "Contribution" => "contribution.md",
+    ],
+)