Doc/link to spark functions

[eruizalo]

No description provided.

[codecov]

Codecov Report

Merging #138 (7d59780) into main (ccd80c8) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #138      +/-   ##
==========================================
- Coverage   94.84%   94.84%   -0.01%     
==========================================
  Files          41       41              
  Lines         698      697       -1     
  Branches        9       11       +2     
==========================================
- Hits          662      661       -1     
  Misses         36       36              

Impacted Files	Coverage Δ
...re/src/main/scala/doric/syntax/BinaryColumns.scala	100.00% <ø> (ø)
...e/src/main/scala/doric/syntax/BooleanColumns.scala	100.00% <ø> (ø)
...re/src/main/scala/doric/syntax/CommonColumns.scala	94.12% <ø> (ø)
core/src/main/scala/doric/syntax/DateColumns.scala	100.00% <ø> (ø)
...src/main/scala/doric/syntax/TimestampColumns.scala	80.00% <ø> (ø)
...re/src/main/scala/doric/syntax/StringColumns.scala	100.00% <100.00%> (ø)

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[eruizalo]

Some issues found trying to document (via link) these functions:

• org.apache.spark.sql.functions.locate
• org.apache.spark.sql.functions.split
• org.apache.spark.sql.functions.to_utc_timestamp
• org.apache.spark.sql.functions.from_utc_timestamp

Related to issue #135