readme

README.md

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+# Cathcal
+
+Small Go tool to generate a Roman Rite liturgical calendar in ICS format.
+
+## Usage
+
+```bash
+go run main.go <year>
+go run main.go <start-end>
+go run main.go --merge <start-end>
+```
+
+## Output
+
+- Single year: calendario_liturgico_<year>.ics
+- Range: calendario_liturgico_<start>-<end>.ics
+- With --merge: one merged file for the range