Organise ddl statements into separate files per create table (#251)

web/backend/Database/Database.Migrations/scripts/01-schema/07-Country.sql

@@ -0,0 +1,17 @@
+CREATE TABLE Country
+(
+    CountryID UNIQUEIDENTIFIER
+        CONSTRAINT DF_CountryID DEFAULT NEWID(),
+
+    CountryName NVARCHAR(100) NOT NULL,
+
+    ISO3166_1 CHAR(2) NOT NULL,
+
+    RowVersion ROWVERSION,
+
+    CONSTRAINT PK_Country
+        PRIMARY KEY (CountryID),
+
+    CONSTRAINT AK_Country_ISO3166_1
+        UNIQUE (ISO3166_1)
+);