Migration to plugin template and add climpact functionality

In this merge request, w migrated the plugin to the plugin template and added Climpact functionality with the specified configuration. Please check the README for instructions on plug and testing the plugin. Let me know if you face any issues. Also, we should schedule a meeting to discuss the next steps on the statistical methods together.

But still there is a big room for developing here. Files organization don't look good to me which we need to take care of that.

One production test is located here. So it mean every time you push into the repository, you test the plugin on production as I did in the following link. But no worries, in the meeting I explain it in detail

https://ch1187.gitlab-pages.dkrz.de/-/plugins4freva/heat2urbanimpact/-/jobs/505029/artifacts/build/prod_test/index.html

Closes #1 (closed)

wrapper.py

@@ -50,7 +50,7 @@ class Heat2UrbanImpact(plugin.PluginAbstract):
     # Optional long description of the author of the plugin
     __long_description__: Optional[
         str
-    ] = "Extension or composition of various existing plugins or program parts for the barrier-free transfer of meteorological data (representative of certain climatological heat events) into an urban climate model"
+    ] = "This plugin extracts the development of the atmospheric temperature stratification during a specified heat/warm period from regional climate model data and tailors the data for the usage in urban impact models. For a selectable region of interest and period of time this plugin returns hourly temperature data at different layers/hights in a directly usable format (format specification). This plugin is based on the NUKLEUS ensemble of 3km horizontal grid."
 
     ######################################################
     # Define the parameters for the plugin * Mandatory
@@ -85,13 +85,13 @@ class Heat2UrbanImpact(plugin.PluginAbstract):
             name="experiment",
             mandatory=True,
             facet="experiment",
-            help="Select a climate model experiment.",
+            help="Select the model simulation of interest: historical or projection (global warming level +2K or +3K)",
             max_items=1,
             predefined_facets={
                 "project": ["nukleus"],
                 "product": ["ceu-3"],
                 "time_frequency": ["1hr"],
-                "variable": ["tas", "ta300", "ta500", "ta700", "ta950"],
+                "variable": ["tas", "tasmin", "tasmax"],
             },
         ),
         SolrField(
@@ -104,42 +104,42 @@ class Heat2UrbanImpact(plugin.PluginAbstract):
                 "project": ["nukleus"],
                 "product": ["ceu-3"],
                 "time_frequency": ["1hr"],
-                "variable": ["tas", "ta300", "ta500", "ta700", "ta950"],
+                "variable": ["tas", "tasmin", "tasmax"],
             },
             help=(
-                "Select climate model(s). Multiple models can be chosen for simultaneous output."
+                "Select climate model(s) from the NUKLEUS ensemble. Multiple models can be chosen for simultaneous output."
             ),
         ),
         SelectField(
             name="event",
-            default="Heat Wave",
-            options={"heat_wave": "Heat Wave", "extreme_heat": "Extreme Heat"},
-            help="Select the type of heat event to analyze. IT'S NOT IMPLEMENTED YET.",
+            default="95",
+            options={"75th percentile": "75", "85th percentile": "85", "95th percentile": "95"},
+            help="Select the exceptionality of the heat/warm period by selecting percentiles of temperature probability distribution. Default is the 95th percentile. IT'S NOT IMPLEMENTED YET.",
         ),
         Integer(
             name="length_of_event",
             default=3,
-            help="Duration of the heat event in days. IT'S NOT IMPLEMENTED YET.",
+            help="Enter the number of days of the heat/warm period you would like to receive as output. An integer between 1 and 14 days would be plausible. Default is 3 days. IT'S NOT IMPLEMENTED YET.",
         ),
-        SelectField(
+        String(
             name="months_of_event",
-            default="Summer (Jun-Aug)",
-            options={
-                "JJA": "Summer (Jun-Aug)",
-                "DJF": "Winter (Dec-Feb)",
-                "MAM": "Spring (Mar-May)",
-                "SON": "Autumn (Sep-Nov)",
-            },
-            help="Select the season for the analysis. IT'S NOT IMPLEMENTED YET.",
+            default="July",
+            #options={
+            #    "JJA": "Summer (Jun-Aug)",
+            #    "DJF": "Winter (Dec-Feb)",
+            #    "MAM": "Spring (Mar-May)",
+            #    "SON": "Autumn (Sep-Nov)",
+            #},
+            help="Enter the month(s) when your heat event is supposed to happen for your studies. E.g. for single month 'June' or for multiple months 'May:August'. Default is 'July'. IT'S NOT IMPLEMENTED YET.",
         ),
         SelectField(
             name="impact_model",
-            default="Basic Impact Model",
+            default=None,
             options={
-                "basic": "Basic Impact Model",
-                "advanced": "Advanced Impact Model",
+                "ENVI-met": "ENVI-met",
+                "PALM": "PALM",
             },
-            help="Select the impact model to use for analysis. IT'S NOT IMPLEMENTED YET.",
+            help="The format of the output will be tailored for the selected impact model. IT'S NOT IMPLEMENTED YET.",
         ),
         String(
             name="start",