initialise sourcehut CI

esv is now built and briefly tested on Arch Linux and OpenBSD.

.builds/openbsd.yml

@@ -0,0 +1,17 @@
+---
+image: openbsd/latest
+packages:
+  - curl
+  - ldc
+sources:
+  - "https://git.sr.ht/~jeremy/esv"
+tasks:
+  - build: |
+      cd esv
+      ./configure
+      make
+  - install: |
+      doas make -Cesv install
+  - test: |
+      # very basic test :)
+      esv Matthew 5-7 >/dev/null