[SPARK-51521] Add integral/floating/string/date type test and answer files

### What changes were proposed in this pull request?

This PR aims to add `integral/floating/string/date` type test and answer files.

### Why are the changes needed?

To provide a test coverage for these types. During testings, it turns out `decimal` and `timestamp` type has some issues. It will be added.

### Does this PR introduce _any_ user-facing change?

No, this is a test-only change.

### How was this patch tested?

Pass the CIs and manual tests.

```
$ swift test --filter SQLTests
...
􀟈  Suite SQLTests started.
􀟈  Test runAll() started.
date.sql
floating.sql
integral.sql
pipesyntax.sql
select.sql
string.sql
􁁛  Test runAll() passed after 0.191 seconds.
􁁛  Suite SQLTests passed after 0.191 seconds.
􁁛  Test run with 1 test passed after 0.191 seconds.
```

### Was this patch authored or co-authored using generative AI tooling?

No.

Closes #19 from dongjoon-hyun/SPARK-51521.

Authored-by: Dongjoon Hyun <[email protected]>
Signed-off-by: Dongjoon Hyun <[email protected]>

Author: dongjoon-hyun

Tests/SparkConnectTests/Resources/queries/date.sql

@@ -0,0 +1 @@
+SELECT DATE '2025-03-15'

Tests/SparkConnectTests/Resources/queries/date.sql.json

@@ -0,0 +1 @@
+[["2025-03-15 00:00:00 +0000"]]

Tests/SparkConnectTests/Resources/queries/floating.sql

@@ -0,0 +1,5 @@
+SELECT
+1.0F, -2.0F,
+3.0D, -4.0D,
+float('inf'), float('NaN'),
+double('inf'), double('NaN')

Tests/SparkConnectTests/Resources/queries/floating.sql.json

@@ -0,0 +1 @@
+[["1.0","-2.0","3.0","-4.0","inf","nan","inf","nan"]]

Tests/SparkConnectTests/Resources/queries/integral.sql

@@ -0,0 +1,5 @@
+SELECT
+127Y, -128Y,
+32767S, -32768S,
+2147483647, -2147483648,
+9223372036854775807L, -9223372036854775808L

Tests/SparkConnectTests/Resources/queries/integral.sql.json

@@ -0,0 +1 @@
+[["127","-128","32767","-32768","2147483647","-2147483648","9223372036854775807","-9223372036854775808"]]

Tests/SparkConnectTests/Resources/queries/string.sql

@@ -0,0 +1 @@
+SELECT 'abc', 'def'

Tests/SparkConnectTests/Resources/queries/string.sql.json

@@ -0,0 +1 @@
+[["abc","def"]]