Add flake with templates

flake.nix

@@ -0,0 +1,32 @@
+{
+  description = "A collection of flake templates for jungle";
+
+  outputs =
+    { self }:
+    {
+      templates = {
+        ompss2 = {
+          path = ./ompss2;
+          description = "LLVM compiler to build OmpSs-2 with nodes and nOS-V";
+          welcomeText = ''
+            # Getting started
+            - Run `nix develop`
+            - Run `make`
+
+            Open README.md for more
+          '';
+        };
+        cuda = {
+          path = ./cuda;
+          description = "CUDA development in nix";
+          welcomeText = ''
+            Run `nix develop` to load the environment and `make` to build the
+            example CUDA program. Run it with `./cudainfo` from the fox machine to
+            test it.
+          '';
+        };
+      };
+
+      defaultTemplate = self.templates.ompss2;
+    };
+}