Add XML documentation (#10)

The prior `///` F# documentation blocks were not rendering in IDEs, and parameters were not documented. This change adds complete XML documentation to all (but `Compat`) classes, methods, and functions.

Reviewed-on: #10

src/Tests.CSharp/SqliteCSharpTests.cs

@@ -75,7 +75,7 @@ public static class SqliteCSharpTests
         ]),
         TestCase("WhereById succeeds", () =>
         {
-            Expect.equal(Sqlite.Query.WhereById("@id"), "data->>'Id' = @id", "WHERE clause not correct");
+            Expect.equal(Sqlite.Query.WhereById("abc"), "data->>'Id' = @id", "WHERE clause not correct");
         }),
         TestCase("Patch succeeds", () =>
         {
@@ -141,9 +141,9 @@ public static class SqliteCSharpTests
             Expect.isEmpty(Parameters.None, "The parameter list should have been empty");
         })
     ]);
-    
+
     // Results are exhaustively executed in the context of other tests
-    
+
     /// <summary>
     /// Add the test documents to the database
     /// </summary>
@@ -989,7 +989,7 @@ public static class SqliteCSharpTests
             })
         ])
     ]);
-    
+
     /// <summary>
     /// All tests for SQLite C# functions and methods
     /// </summary>