ARROW-7925: [C++][Docs] Better document use of IWYU, including new 'match' option
ARROW-7925: [C++][Docs] Better document use of IWYU, including new 'match' option

Closes #7538 from wesm/ARROW-7925

Authored-by: Wes McKinney <039810fad096c61acdfe8791ea9d6e2d5461285b@apache.org>
Signed-off-by: Wes McKinney <039810fad096c61acdfe8791ea9d6e2d5461285b@apache.org>

xhochy/arrow,icexelloss/arrow,cpcloud/arrow,xhochy/arrow,laurentgo/arrow,apache/arrow,xhochy/arrow,icexelloss/arrow,laurentgo/arrow,apache/arrow,apache/arrow,apache/arrow,cpcloud/arrow,laurentgo/arrow,xhochy/arrow,cpcloud/arrow,kou/arrow,cpcloud/arrow,cpcloud/arrow,xhochy/arrow,icexelloss/arrow,laurentgo/arrow,wesm/arrow,icexelloss/arrow,kou/arrow,xhochy/arrow,icexelloss/arrow,laurentgo/arrow,icexelloss/arrow,cpcloud/arrow,icexelloss/arrow,laurentgo/arrow,wesm/arrow,wesm/arrow,laurentgo/arrow,kou/arrow,kou/arrow,kou/arrow,xhochy/arrow,apache/arrow,wesm/arrow,laurentgo/arrow,wesm/arrow,wesm/arrow,xhochy/arrow,kou/arrow,icexelloss/arrow,kou/arrow,icexelloss/arrow,laurentgo/arrow,wesm/arrow,laurentgo/arrow,icexelloss/arrow,laurentgo/arrow,apache/arrow,icexelloss/arrow,laurentgo/arrow,wesm/arrow,kou/arrow,cpcloud/arrow,apache/arrow,cpcloud/arrow,xhochy/arrow,cpcloud/arrow,wesm/arrow,kou/arrow,laurentgo/arrow,wesm/arrow,wesm/arrow,apache/arrow,laurentgo/arrow,xhochy/arrow,xhochy/arrow,kou/arrow,kou/arrow,apache/arrow,cpcloud/arrow,wesm/arrow,xhochy/arrow,kou/arrow,laurentgo/arrow,apache/arrow,apache/arrow,wesm/arrow,icexelloss/arrow,apache/arrow,kou/arrow,cpcloud/arrow,apache/arrow,apache/arrow,cpcloud/arrow,xhochy/arrow,icexelloss/arrow,icexelloss/arrow,kou/arrow,xhochy/arrow,cpcloud/arrow,wesm/arrow,cpcloud/arrow,xhochy/arrow