Move SiteGenerator into executable only and rename library to Byg.*

byg/byg.cabal

@@ -20,23 +20,22 @@ library
     import: common
     hs-source-dirs: src
     exposed-modules:
-        Types.Token
-        Types.Value
-        Types.Functions
-        Types.Dependency
-        Types.Date
-        Types
-        DependencyGenerator
-        Functions.Image
-        Functions.Pandoc
-        Functions.Paths
-        Functions.Template
-        Functions.Text
-        Functions.Date
-        Functions.Atom
-        Functions
-        DependencyRunner
-        SiteGenerator
+        Byg.Types.Token
+        Byg.Types.Value
+        Byg.Types.Functions
+        Byg.Types.Dependency
+        Byg.Types.Date
+        Byg.Types
+        Byg.DependencyGenerator
+        Byg.Functions.Image
+        Byg.Functions.Pandoc
+        Byg.Functions.Paths
+        Byg.Functions.Template
+        Byg.Functions.Text
+        Byg.Functions.Date
+        Byg.Functions.Atom
+        Byg.Functions
+        Byg.DependencyRunner
     build-depends:
         base >=4.14 && <4.20
       , mtl
@@ -52,7 +51,10 @@ library
 
 executable byg
     import: common
-    main-is: src/Main.hs
+    hs-source-dirs: app
+    main-is: Main.hs
+    other-modules:
+        SiteGenerator
     build-depends:
         base >=4.14 && <4.20
       , byg