Add initial Fyne GUI prototype

README.md

@@ -1,2 +1,30 @@
-# pysentry
+# PySentry
 
+PySentry is a cross-platform desktop scheduler inspired by cron.
+
+The project is starting with the GUI shell first, then the scheduling core.
+
+## Requirements
+
+- Go 1.22 or newer
+- A C compiler for Fyne builds on Windows, for example MSYS2/MinGW-w64
+
+## Run
+
+```powershell
+go mod tidy
+go run ./cmd/pysentry
+```
+
+If Go is installed but not available in `PATH`, use the full path:
+
+```powershell
+& 'C:\Program Files\Go\bin\go.exe' run ./cmd/pysentry
+```
+
+## Current shape
+
+- `cmd/pysentry` starts the desktop app.
+- `internal/app` contains the first Fyne-based interface prototype.
+- Jobs can be created, edited, paused/resumed, and run manually in memory.
+- Job persistence, cron parsing, and process execution are planned for the next phase.