Added readme

README.md

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+# Gordle
+
+Go implementation of Wordle game
+
+## Building instructions
+
+```bash
+git clone https://git.dmitriy.icu/dm1sh/gordle
+cd gordle
+go mod tidy
+go build .
+```
+
+## Running instructions
+
+```bash
+% ./gordle --help                                                                                                                                                              
+Usage of ./gordle:
+  -n int
+        Word size (default 5)
+```
+
+## Dictionaries
+
+To run game you also need dictionary files. By default gordle searches for them in `./dictionary/<n>.txt` file, where `<n>` - number of characters, specified by `-n` flag