Add a table function for creating a temporary table for a statement

[CHAZOTA]

New Table Function to allow writing of queries over temporary tables.

[codecov-io]

Codecov Report

Merging #76 into master will increase coverage by 0.11%.

@@            Coverage Diff             @@
##           master      #76      +/-   ##
==========================================
+ Coverage   81.57%   81.69%   +0.11%     
==========================================
  Files          42       43       +1     
  Lines        1140     1147       +7     
  Branches      100      100              
==========================================
+ Hits          930      937       +7     
  Misses        210      210

Impacted Files	Coverage Δ
sqlest/src/main/scala/sqlest/package.scala	100% <ø> (ø)	:white_check_mark:
sqlest/src/main/scala/sqlest/ast/Relation.scala	86.95% <ø> (ø)	:white_check_mark:
...scala/sqlest/ast/operations/ColumnOperations.scala	94.91% <100%> (+0.08%)	:white_check_mark:
...rc/main/scala/sqlest/sql/DB2StatementBuilder.scala	81.03% <100%> (+0.33%)	:white_check_mark:
.../scala/sqlest/ast/syntax/TableFunctionSyntax.scala	100% <100%> (ø)
...n/scala/sqlest/sql/base/BaseStatementBuilder.scala	90.9% <100%> (+0.08%)	:white_check_mark:
...scala/sqlest/sql/base/SelectStatementBuilder.scala	97.01% <100%> (+0.09%)	:white_check_mark:

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[DavidGregory084]

Perfect, thanks @CHAZOTA!