Refactor save return type without Either

README.md

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+# Weather Tool
+
+Tool for downloading historical and real-time data from 33 weather stations in Latvia. It aggregates and displays data for different time periods, cities, and weather parameters.
+
+## Run
+```
+// scala
+sbt run
+
+// web
+cd web/
+npm run dev
+```
+
+**Author:** Guntis Smaukstelis  
+**Mentor:** Jānis Komuls
+
+**Status:** Live  
+**URL:** [https://weather-tool.fly.dev/](https://weather-tool.fly.dev/)  
+**Used By:** State television weather news  
+**Repository:** [https://github.com/guntisdev/WeatherTool](https://github.com/guntisdev/WeatherTool)
+
+## Backend Technologies:
+- cats-effects
+- http4s
+- pureconfig
+- fs2
+- circe
+- scalatest
+
+## Frontend Technologies:
+- SolidJS
+- Vite
+
+## Deployment:
+- Docker
+- Shell script
+- Fly.io