ESQL: Fix Max doubles bug with negatives and add tests for Max and Min (#110586)

`MAX()` currently doesn't work with doubles smaller than
`Double.MIN_VALUE` (Note that `Double.MIN_VALUE` returns the smallest
non-zero positive, not the smallest double).

This PR adds tests for Max and Min, and fixes the bug (Detected by the
tests).

Also, as the tests now generate the docs, replaced the old docs with the
generated ones, and updated the Max&Min examples.

Author: ivancea

docs/changelog/110586.yaml

@@ -0,0 +1,5 @@
+pr: 110586
+summary: "ESQL: Fix Max doubles bug with negatives and add tests for Max and Min"
+area: ES|QL
+type: bug
+issues: []

docs/reference/esql/functions/aggregation-functions.asciidoc

@@ -11,10 +11,10 @@ The <<esql-stats-by>> command supports these aggregate functions:
 * <<esql-avg>>
 * <<esql-agg-count>>
 * <<esql-agg-count-distinct>>
-* <<esql-agg-max>>
+* <<esql-max>>
 * <<esql-agg-median>>
 * <<esql-agg-median-absolute-deviation>>
-* <<esql-agg-min>>
+* <<esql-min>>
 * <<esql-agg-percentile>>
 * experimental:[] <<esql-agg-st-centroid>>
 * <<esql-agg-sum>>
@@ -25,14 +25,14 @@ The <<esql-stats-by>> command supports these aggregate functions:
 
 include::count.asciidoc[]
 include::count-distinct.asciidoc[]
-include::max.asciidoc[]
 include::median.asciidoc[]
 include::median-absolute-deviation.asciidoc[]
-include::min.asciidoc[]
 include::percentile.asciidoc[]
 include::st_centroid_agg.asciidoc[]
 include::sum.asciidoc[]
 include::layout/avg.asciidoc[]
+include::layout/max.asciidoc[]
+include::layout/min.asciidoc[]
 include::layout/top.asciidoc[]
 include::values.asciidoc[]
 include::weighted-avg.asciidoc[]