feat(parser): create keyspace query

[Fyko]

This PR also, by proxy, enables multi-line statement construction.

[codecov]

Codecov Report

Merging #23 (bcedefe) into main (0ce9eaa) will increase coverage by 1.28%.
The diff coverage is 94.96%.

@@            Coverage Diff             @@
##             main      #23      +/-   ##
==========================================
+ Coverage   83.23%   84.51%   +1.28%     
==========================================
  Files          25       27       +2     
  Lines        2141     2409     +268     
==========================================
+ Hits         1782     2036     +254     
- Misses        359      373      +14     

Files	Coverage Δ
scyllax-parser/src/comment.rs	100.00% <100.00%> (ø)
scyllax-parser/src/common.rs	93.61% <100.00%> (+0.59%)	⬆️
scyllax-parser/src/where.rs	100.00% <100.00%> (ø)
scyllax-parser/src/create_keyspace.rs	96.79% <96.79%> (ø)
scyllax-parser/src/lib.rs	88.57% <70.37%> (-11.43%)	⬇️

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