add Odin lang

odin/README.md

@@ -0,0 +1,34 @@
+# Gilded Rose starting position in Odin
+
+Learn how to install Odin on your system [here](https://odin-lang.org/docs/install/)
+
+## Run unit tests from the command line
+```
+$ odin test tests
+```
+## Run the TextTest fixture on the command line
+Build and install the executable
+
+```
+$ odin build gilded_rose
+```
+
+Execute it on the command line with an argument for the number of days:
+
+### macOS:
+
+```
+$ ./gilded_rose.bin 10
+```
+### Windows:
+
+```
+$ ./gilded_rose.exe 10
+```
+
+## Run the TextTest approval test that comes with this project
+There are instructions in the TextTest Readme for setting up TextTest. You will need to specify the executable in `config.gr`. Uncomment this line to use it:
+
+```
+#executable:${TEXTTEST_HOME}/odin/gilded_rose(include your OS executable extension here)
+```