LibSQL: Add SQL files to assist in troubleshooting

These files contain the same SQL statements as the similarly named tests
in Tests/LibSQL/TestSqlStatementExecution.cpp test suite. They can be
fed to the sql utility to assist in troubleshooting failing tests.

Base/home/anon/Documents/sql/select_cross_join.sql

@@ -0,0 +1,26 @@
+CREATE SCHEMA TestSchema;
+CREATE TABLE TestSchema.TestTable1
+(
+    TextColumn1 text,
+    IntColumn   integer
+);
+CREATE TABLE TestSchema.TestTable2
+(
+    TextColumn2 text,
+    IntColumn   integer
+);
+INSERT INTO TestSchema.TestTable1 (TextColumn1, IntColumn)
+VALUES ('Test_1', 42),
+       ('Test_3', 44),
+       ('Test_2', 43),
+       ('Test_4', 45),
+       ('Test_5', 46);
+INSERT INTO TestSchema.TestTable2 (TextColumn2, IntColumn)
+VALUES ('Test_10', 40),
+       ('Test_11', 41),
+       ('Test_12', 42),
+       ('Test_13', 47),
+       ('Test_14', 48);
+SELECT *
+FROM TestSchema.TestTable1,
+     TestSchema.TestTable2;