test docs build

[drizk1]

this pr will separate agg and window functions docs into their own page
udfs and flexible syntax into its own page as well

[drizk1]

the documenter part, i'm sure i can fix.

as for this issue in every docstring i have no idea what to do or how to mute the warning. I cant reproduced just using DuckDB. and I dont use nextDataChunk anywhere except in the streaming function, which isnt even tested...

someone in teh slack said i can add --depwarn = false to the CI.yml. but i have tried a few places with no success.

│   diff =
│    ┌ Warning: **DEPRECATION NOTICE**: This method is scheduled for removal in a future release.
│    │   caller = nextDataChunk(q::DuckDB.QueryResult) at result.jl:822
│    └ @ DuckDB ~/.julia/packages/DuckDB/5Gcwk/src/result.jl:822
│    ┌ Warning: **DEPRECATION NOTICE**: This method is scheduled for removal in a future release.
│    │   caller = nextDataChunk(q::DuckDB.QueryResult) at result.jl:832
│    └ @ DuckDB ~/.julia/packages/DuckDB/5Gcwk/src/result.jl:832
│    ┌ Warning: **DEPRECATION NOTICE**: This method is scheduled for removal in a future release.
│    │   caller = nextDataChunk(q::DuckDB.QueryResult) at result.jl:836
│    └ @ DuckDB ~/.julia/packages/DuckDB/5Gcwk/src/result.jl:836