Handle colors for mesh3d in pgfplotsx backend (#5214)

* Handle colors for mesh3d in pgfplotsx backend

* Add name to zenodo

* Separate line and fill color. Also add opacity

Author: darnstrom

.zenodo.json

@@ -792,6 +792,11 @@
             "orcid": "0009-0003-6525-7413",
             "type": "Other"
         },
+        {
+            "name": "Daniel Arnström",
+            "orcid": "0000-0003-0970-0620",
+            "type": "Other"
+        },
         {
             "affiliation": "@JuliaComputing",
             "name": "Παναγιώτης Γεωργακόπουλος",

src/backends/pgfplotsx.jl

@@ -538,6 +538,10 @@ function pgfx_add_series!(::Val{:mesh3d}, axis, series_opt, series, series_func,
         "patch" => nothing,
         "table/row sep" => "\\\\",
         "patch table" => join(ptable, "\n        "),
+        "fill" => opt[:fillcolor],
+        "faceted color" => opt[:linecolor],
+        "opacity" => something(get_fillalpha(series), 1.0),
+        "draw opacity" => something(get_linealpha(series), 1.0),
     )
     return pgfx_add_series!(axis, series_opt, series, series_func, opt)
 end