Add documentation for the transpile task

Part of #201

README.md

@@ -243,6 +243,21 @@ Currently, the following cases are available for this task:
 - Go
   - [`golang/mistakes`](testdata/golang/mistakes)
 
+### Task: Transpile
+
+Transpile is the task of converting source code from one language to another.
+
+The test data repository for this task consists of several packages. At the root of each package, there must be a folder called `implementation` containing a **single file**, which is the one to be transpiled. Each package must also contain a source file with a stub (a function signature so the LLM's know the signature of the function they need to generate code for) and a valid test suite. The LLM's response is then validated with the predefined test suite.
+
+#### Cases
+
+Currently, the following cases are available for this task:
+
+- Java
+  - [`java/transpile`](testdata/java/transpile)
+- Go
+  - [`golang/transpile`](testdata/golang/transpile)
+
 ### Reward Points
 
 Currently, the following points are awarded for any task: