Add ignore leading and trailing white space to csv parser (#8960)

# Which issue does this PR close?

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enhancements and this helps us generate change logs for our releases.
You can link an issue to this PR using the GitHub syntax.

- Closes #8961

# Rationale for this change
Spark's csv writer can do this and it would be nice to have feature
parity in projects like datafusion.
Why are you proposing this change? If this is already explained clearly
in the issue then this section is not needed.
Explaining clearly why changes are proposed helps reviewers understand
your changes and offer better suggestions for fixes.

# What changes are included in this PR?
Adds two new options for `ignore_leading_whitespace` and
`ignore_trailing_whitespace` to csv writer.
There is no need to duplicate the description in the issue here but it
is sometimes worth providing a summary of the individual changes in this
PR.

# Are these changes tested?
Yes
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1. Prevent the code from being accidentally broken by subsequent changes
2. Serve as another way to document the expected behavior of the code

If tests are not included in your PR, please explain why (for example,
are they covered by existing tests)?

# Are there any user-facing changes?

If there are user-facing changes then we may require documentation to be
updated before approving the PR.

If there are any breaking changes to public APIs, please call them out.

Author: xanderbailey

arrow-csv/examples/whitespace_handling.rs

@@ -0,0 +1,86 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+use arrow_array::*;
+use arrow_csv::WriterBuilder;
+use arrow_schema::*;
+use std::sync::Arc;
+
+fn main() {
+    // Create a sample schema with string columns
+    let schema = Schema::new(vec![
+        Field::new("name", DataType::Utf8, false),
+        Field::new("city", DataType::Utf8, false),
+        Field::new("country", DataType::Utf8, false),
+    ]);
+
+    // Create sample data with leading and trailing whitespace
+    let name = StringArray::from(vec![
+        "  John Doe  ",
+        "  Jane Smith",
+        "Bob Johnson  ",
+        "Alice Williams",
+    ]);
+    let city = StringArray::from(vec![
+        "  New York  ",
+        "Los Angeles  ",
+        "  Chicago",
+        "Houston",
+    ]);
+    let country = StringArray::from(vec!["  USA  ", "  USA  ", "  USA  ", "  USA  "]);
+
+    let batch = RecordBatch::try_new(
+        Arc::new(schema),
+        vec![Arc::new(name), Arc::new(city), Arc::new(country)],
+    )
+    .unwrap();
+
+    println!("Original CSV (with whitespace):");
+    let mut buf = Vec::new();
+    let mut writer = WriterBuilder::new().build(&mut buf);
+    writer.write(&batch).unwrap();
+    drop(writer);
+    println!("{}", String::from_utf8(buf).unwrap());
+
+    println!("\nCSV with ignore_leading_whitespace:");
+    let mut buf = Vec::new();
+    let mut writer = WriterBuilder::new()
+        .with_ignore_leading_whitespace(true)
+        .build(&mut buf);
+    writer.write(&batch).unwrap();
+    drop(writer);
+    println!("{}", String::from_utf8(buf).unwrap());
+
+    println!("\nCSV with ignore_trailing_whitespace:");
+    let mut buf = Vec::new();
+    let mut writer = WriterBuilder::new()
+        .with_ignore_trailing_whitespace(true)
+        .build(&mut buf);
+    writer.write(&batch).unwrap();
+    drop(writer);
+    println!("{}", String::from_utf8(buf).unwrap());
+
+    println!("\nCSV with both ignore_leading_whitespace and ignore_trailing_whitespace:");
+    let mut buf = Vec::new();
+    let mut writer = WriterBuilder::new()
+        .with_ignore_leading_whitespace(true)
+        .with_ignore_trailing_whitespace(true)
+        .build(&mut buf);
+    writer.write(&batch).unwrap();
+    drop(writer);
+    println!("{}", String::from_utf8(buf).unwrap());
+}