Update docs to meet JOSS review criteria

docs/INDEX.md

@@ -1,8 +1,11 @@
-# eCLM Documentation
+# Welcome to eCLM!
 
-```{important}
-**Welcome!** You are viewing the first version of the documentation for eCLM. This is a living document, which means it will be continuously updated and improved. Please check back regularly for the latest information and updates.
+```{warning}
+TODO
 ```
 
 eCLM is based on version 5.0 of the Community Land Model ([CLM5](https://www.cesm.ucar.edu/models/clm)) with simplified infrastructure for build and namelist generation. The build system is handled entirely by Cmake and namelists are generated through a small set of Python scripts. Similar to CLM5, eCLM is forced with meteorological data and uses numerous input streams on soil properties, land cover and land use, as well as complex parameter sets on crop phenology, and plant hydraulics for simulations.
 
+An overview of eCLM can be seen from this [poster](https://virtual.oxfordabstracts.com/event/75166/submission/35) which was presented at [RSECon'25](https://rsecon25.society-rse.org).
+
+![eCLM poster](users_guide/images/rsecon25_eclm_poster.jpg)

docs/_toc.yml

@@ -5,10 +5,10 @@ root: INDEX
 parts:
 - caption: Introduction
   chapters:
-  - file: users_guide/installation/README
-    title: Installing eCLM
   - file: users_guide/introduction/introduction
     title: Scientific Background
+  - file: users_guide/introduction/first_tutorial.md
+    title: First Tutorial
 
 - caption: User's Guide
   chapters:
@@ -27,13 +27,6 @@ parts:
 
   - file: users_guide/case_creation/README
     title: Creating a custom case
-    sections:
-    - file: users_guide/case_creation/1_create_grid_file
-    - file: users_guide/case_creation/2_create_mapping_file
-    - file: users_guide/case_creation/3_create_domain_file
-    - file: users_guide/case_creation/4_create_surface_file
-    - file: users_guide/case_creation/5_modifications_surface_domain_file
-    - file: users_guide/case_creation/6_create_atm_forcings
 
 - caption: Developer's Guide
   chapters:
@@ -47,7 +40,3 @@ parts:
   - file: reference/history_fields
   - url: https://escomp.github.io/CTSM/release-clm5.0/tech_note/index.html
     title: CLM5 Technical Note
-  - url: https://github.com/HPSCTerrSys/eCLM_static-file-generator/blob/main/README.md)
-    title: eCLM static file generator
-  - url: https://hpscterrsys.github.io/TSMP2_workflow-engine
-    title: TSMP2 Workflow Engine