Add recipes

recipes/wip/games/leafish/recipe.toml

+#TODO Not compiled or tested
+[source]
+git = "https://github.com/Lea-fish/Leafish"
+[build]
+template = "cargo"
+dependencies = [
+    "gtk3",
+    "openssl1",
+]

recipes/wip/tools/rusync/recipe.toml

+#TODO Not compiled or tested
+[source]
+git = "https://github.com/your-tools/rusync"
+[build]
+template = "cargo"

recipes/wip/tools/skyspell/recipe.toml

+#TODO missing an enchant backend and dictionary, see https://github.com/your-tools/skyspell#installation
+[source]
+git = "https://github.com/your-tools/skyspell"
+[build]
+template = "custom"
+dependencies = [
+    "sqlite3",
+    "enchant",
+]
+script = """
+cookbook_cargo_packages skyspell
+"""