[SPARK-31566][SQL][DOCS] Add SQL Rest API Documentation
[SPARK-31566][SQL][DOCS] Add SQL Rest API Documentation

### What changes were proposed in this pull request?
SQL Rest API exposes query execution details and metrics as Public API. Its documentation will be useful for the end-users.

### Why are the changes needed?
SQL Rest API does not exist under Spark Rest API.

### Does this PR introduce any user-facing change?
No

### How was this patch tested?
Manually build and check

Closes #28354 from erenavsarogullari/SPARK-31566.

Lead-authored-by: Eren Avsarogullari <bb17ceaebfad9dc41a48eb3194bd3f43cdf23f02@gmail.com>
Co-authored-by: Gengliang Wang <bfe1a7b36425bd89859a70a36586361d28ec35eb@databricks.com>
Co-authored-by: Eren Avsarogullari <7b6bcc589905cd86cdf6e6bbab964a86e516e0e1@gmail.com>
Signed-off-by: Gengliang Wang <bfe1a7b36425bd89859a70a36586361d28ec35eb@databricks.com>

ueshin/apache-spark,rednaxelafx/apache-spark,taroplus/spark,ConeyLiu/spark,dongjoon-hyun/spark,apache/spark,srowen/spark,shuangshuangwang/spark,cloud-fan/spark,zero323/spark,milliman/spark,HyukjinKwon/spark,rednaxelafx/apache-spark,ptkool/spark,vinodkc/spark,apache/spark,JoshRosen/spark,dbtsai/spark,chuckchen/spark,BryanCutler/spark,shaneknapp/spark,apache/spark,dongjoon-hyun/spark,wangyum/spark,nchammas/spark,maropu/spark,dbtsai/spark,holdenk/spark,cloud-fan/spark,wangmiao1981/spark,gengliangwang/spark,rednaxelafx/apache-spark,BryanCutler/spark,mahak/spark,holdenk/spark,dbtsai/spark,wangmiao1981/spark,wzhfy/spark,nchammas/spark,witgo/spark,holdenk/spark,xuanyuanking/spark,dbtsai/spark,HyukjinKwon/spark,ptkool/spark,xuanyuanking/spark,maropu/spark,witgo/spark,BryanCutler/spark,spark-test/spark,wangmiao1981/spark,ConeyLiu/spark,xuanyuanking/spark,gengliangwang/spark,xuanyuanking/spark,WeichenXu123/spark,wangyum/spark,mahak/spark,jiangxb1987/spark,srowen/spark,ptkool/spark,hvanhovell/spark,wangyum/spark,holdenk/spark,zzcclp/spark,milliman/spark,shaneknapp/spark,BryanCutler/spark,milliman/spark,HyukjinKwon/spark,ueshin/apache-spark,apache/spark,srowen/spark,chuckchen/spark,jiangxb1987/spark,ptkool/spark,zzcclp/spark,BryanCutler/spark,dbtsai/spark,hvanhovell/spark,gengliangwang/spark,BryanCutler/spark,nchammas/spark,dbtsai/spark,wzhfy/spark,wangyum/spark,shaneknapp/spark,WeichenXu123/spark,dongjoon-hyun/spark,zero323/spark,zero323/spark,spark-test/spark,taroplus/spark,maropu/spark,milliman/spark,jiangxb1987/spark,ptkool/spark,gengliangwang/spark,spark-test/spark,maropu/spark,WeichenXu123/spark,shuangshuangwang/spark,wzhfy/spark,nchammas/spark,witgo/spark,vinodkc/spark,HyukjinKwon/spark,taroplus/spark,jiangxb1987/spark,shuangshuangwang/spark,JoshRosen/spark,apache/spark,hvanhovell/spark,dbtsai/spark,jiangxb1987/spark,mahak/spark,spark-test/spark,ueshin/apache-spark,zzcclp/spark,shaneknapp/spark,rednaxelafx/apache-spark,cloud-fan/spark,zzcclp/spark,shuangshuangwang/spark,JoshRosen/spark,milliman/spark,gengliangwang/spark,holdenk/spark,vinodkc/spark,taroplus/spark,dongjoon-hyun/spark,cloud-fan/spark,hvanhovell/spark,witgo/spark,taroplus/spark,mahak/spark,jiangxb1987/spark,chuckchen/spark,mahak/spark,srowen/spark,zero323/spark,shuangshuangwang/spark,vinodkc/spark,HyukjinKwon/spark,rednaxelafx/apache-spark,cloud-fan/spark,spark-test/spark,wangmiao1981/spark,JoshRosen/spark,ueshin/apache-spark,ConeyLiu/spark,xuanyuanking/spark,HyukjinKwon/spark,shaneknapp/spark,JoshRosen/spark,cloud-fan/spark,wangyum/spark,wangmiao1981/spark,taroplus/spark,BryanCutler/spark,gengliangwang/spark,ptkool/spark,JoshRosen/spark,apache/spark,shuangshuangwang/spark,xuanyuanking/spark,zzcclp/spark,wangmiao1981/spark,witgo/spark,holdenk/spark,nchammas/spark,wangmiao1981/spark,holdenk/spark,ueshin/apache-spark,zzcclp/spark,ConeyLiu/spark,rednaxelafx/apache-spark,rednaxelafx/apache-spark,nchammas/spark,shuangshuangwang/spark,spark-test/spark,xuanyuanking/spark,chuckchen/spark,zzcclp/spark,spark-test/spark,gengliangwang/spark,wzhfy/spark,hvanhovell/spark,taroplus/spark,WeichenXu123/spark,ConeyLiu/spark,maropu/spark,zero323/spark,chuckchen/spark,hvanhovell/spark,maropu/spark,shaneknapp/spark,vinodkc/spark,WeichenXu123/spark,vinodkc/spark,srowen/spark,ueshin/apache-spark,jiangxb1987/spark,ConeyLiu/spark,srowen/spark,nchammas/spark,maropu/spark,witgo/spark,ueshin/apache-spark,chuckchen/spark,hvanhovell/spark,JoshRosen/spark,WeichenXu123/spark,wzhfy/spark,WeichenXu123/spark,wangyum/spark,wangyum/spark,srowen/spark,witgo/spark,wzhfy/spark,wzhfy/spark,dongjoon-hyun/spark,zero323/spark,dongjoon-hyun/spark,milliman/spark,zero323/spark,apache/spark,chuckchen/spark,ptkool/spark,ConeyLiu/spark,HyukjinKwon/spark,mahak/spark,mahak/spark,vinodkc/spark,shaneknapp/spark,cloud-fan/spark,dongjoon-hyun/spark,milliman/spark