v0.0.13 #4 - 修复和丰富 ICodeFirst.ConfigEntity 方法；

- 增加 FreeSql.Extensions.EFCoreModelBuilder 扩展库，现实与 EFCore 实体共存；
- 增加 FreeSql.RESTful.Demo 示例项目；

FreeSql.Extensions.EFCoreModelBuilder/CodeFirstExtensions.cs

@@ -0,0 +1,64 @@
+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Linq;
+
+namespace FreeSql.Extensions.EFCoreModelBuilder {
+
+	public static class CodeFirstExtensions {
+
+		public static void ConfigEntity(this ICodeFirst codeFirst, ModelBuilder modelBuilder) {
+
+			foreach (var type in modelBuilder.Model.GetEntityTypes()) {
+
+				codeFirst.ConfigEntity(type.ClrType, a => {
+
+					//表名
+					var relationalTableName = type.FindAnnotation("Relational:TableName");
+					if (relationalTableName != null) {
+						a.Name(relationalTableName.Value?.ToString() ?? type.ClrType.Name);
+					}
+
+					foreach (var prop in type.GetProperties()) {
+
+						var freeProp = a.Property(prop.Name);
+
+						//列名
+						var relationalColumnName = prop.FindAnnotation("Relational:ColumnName");
+						if (relationalColumnName != null) {
+
+							freeProp.Name(relationalColumnName.Value?.ToString() ?? prop.Name);
+						}
+
+						//主键
+						freeProp.IsPrimary(prop.IsPrimaryKey());
+
+						//自增
+						freeProp.IsIdentity(prop.GetAnnotations().Where(z => 
+							z.Name == "SqlServer:ValueGenerationStrategy" && z.Value.ToString().Contains("IdentityColumn") //sqlserver 自增
+							|| z.Value.ToString().Contains("IdentityColumn") //其他数据库实现未经测试
+						).Any());
+
+						//可空
+						freeProp.IsNullable(prop.AfterSaveBehavior != Microsoft.EntityFrameworkCore.Metadata.PropertySaveBehavior.Throw);
+
+						//类型
+						var relationalColumnType = prop.FindAnnotation("Relational:ColumnType");
+						if (relationalColumnType != null) {
+
+							var dbType = relationalColumnType.ToString();
+
+							if (!string.IsNullOrEmpty(dbType)) {
+
+								var maxLength = prop.FindAnnotation("MaxLength");
+								if (maxLength != null)
+									dbType += $"({maxLength})";
+
+								freeProp.DbType(dbType);
+							}
+						}
+					}
+				});
+			}
+		}
+	}
+}