Add source hut CI instructions

.build.yml

@@ -0,0 +1,23 @@
+image: alpine/edge
+
+packages:
+  - rustup
+
+sources:
+  - https://git.sr.ht/~victormignot/yorokobot
+
+tasks: 
+  - setup: |
+      rustup default stable
+  
+  - format-check: |
+      cd yorokobot
+      cargo fmt --check
+  
+  - lint-check: |
+      cd yorokobot
+      cargo clippy
+
+  - check-build: |
+      cd yorokobot
+      cargo check