Update release notes (#205)

* Update release notes

Author: FBumann

docs/release-notes/index.md

@@ -4,8 +4,4 @@ This page provides links to release notes for all versions of flixopt.
 
 ## Latest Release
 
-* [v2.0.0](v2.0.0.md) - ????- Migration from pyomo to linopy, improving performance and usability
-
-## Previous Releases
-
-None
+* [v2.0.0](v2.0.0.md) - 29.03.2025 - Migration from pyomo to linopy. Alround improvements in performance and usability

docs/release-notes/v2.0.0.md

@@ -6,8 +6,7 @@
 
 - **Migration from Pyomo to Linopy**: Completely rebuilt the optimization foundation to use Linopy instead of Pyomo
     - Significant performance improvements, especially for large models
-    - Internal useage of linopys own mathematical modeling language
-    - use a flixOpt model as a baseline and extend it with custom constraints or variables using linopys own modeling language
+    - Internal useage of linopys mathematical modeling language
 - **xarray-Based Data Architecture**: Redesigned data handling to rely on xarray.Dataset throughout the package for:
     - Improved solution representation and analysis
     - Enhanced time series management
@@ -21,7 +20,8 @@
 
 ### Model Handling
 
-- **Full Model Export/Import**: As a result of the migration to Linopy, the linopy.Model can be exported before or after the solve. 
+- **Extend every flixopt model with the linopy language**: Add any additional constraint or variable to your flixopt model by using the linopy language.
+- **Full Model Export/Import**: As a result of the migration to Linopy, the linopy.Model can be exported before or after the solve.
 - **Improved Infeasible Model Handling**: Added better detection and reporting for infeasible optimization models
 - **Improved Model Documentation**: Every model can be documented in a .yaml file, containing human readable mathematical formulations of all variables and constraints. THis is used to document every Calculation.
 
@@ -31,9 +31,9 @@ Accessing the results of a Calculation is now as simple as:
 ```python
 fx.FullCalculation('Sim1', flow_system)
 calculation.solve(fx.solvers.HighsSolver())
-calculation.results
+calculation.results  # This object can be entirely saved and reloaded to file without any information loss
 ```
-This access doesn`t change if you save and load the results to a file or use them in your script directly!
+This access doesn't change if you save and load the results to a file or use them in your script directly!
 
 - **Improved Documentation**: The FlowSystem as well as a model Documentation is created for every model run.
 - **Results without saving to file**: The results of a Calculation can now be properly accessed without saving the results to a file first.
@@ -56,18 +56,17 @@ This access doesn`t change if you save and load the results to a file or use the
 
 ## 📚 Documentation
 
+- Imporved documentation of the flixOpt API and mathematical formulations
 - **Google Style Docstrings**: Updated all docstrings to Google style format
 
-## 🐛 Bug Fixes
-
 ## 🔄 Dependencies
 
 - **Linopy**: Added as the core dependency replacing Pyomo
-- **xarray**: Now a critical dependency for data handling
-- **netcdf4**: Optional dependency for compressing netCDF files
+- **xarray**: Now a critical dependency for data handling and file I/O
+- **netcdf4**: Dependency for fast and efficient file I/O
 
 ### Dropped Dependencies
-- **pyomo**: Removed as the core dependency replacing Linopy
+- **pyomo**: Replaced by linopy as the modeling language
 
 ## 📋 Migration Notes