replace bors with mergify

.mergify.yml

@@ -0,0 +1,42 @@
+queue_rules:
+  - name: default
+    merge_conditions:
+      - check-success=Evaluate flake.nix
+      - check-success=check bcachefs [x86_64-linux]
+      - check-success=check boot-raid1 [x86_64-linux]
+      - check-success=check btrfs-subvolumes [x86_64-linux]
+      - check-success=check cli [x86_64-linux]
+      - check-success=check complex [x86_64-linux]
+      - check-success=check gpt-bios-compat [x86_64-linux]
+      - check-success=check hybrid [x86_64-linux]
+      - check-success=check hybrid-tmpfs-on-root [x86_64-linux]
+      - check-success=check luks-lvm [x86_64-linux]
+      - check-success=check lvm-raid [x86_64-linux]
+      - check-success=check lvm-sizes-sort [x86_64-linux]
+      - check-success=check mdadm [x86_64-linux]
+      - check-success=check module [x86_64-linux]
+      - check-success=check multi-device-no-deps [x86_64-linux]
+      - check-success=check negative-size [x86_64-linux]
+      - check-success=check shellcheck [x86_64-linux]
+      - check-success=check simple-efi [x86_64-linux]
+      - check-success=check standalone [x86_64-linux]
+      - check-success=check swap [x86_64-linux]
+      - check-success=check tmpfs [x86_64-linux]
+      - check-success=check with-lib [x86_64-linux]
+      - check-success=check zfs [x86_64-linux]
+      - check-success=check zfs-over-legacy [x86_64-linux]
+      - check-success=package default [x86_64-linux]
+      - check-success=package disko [x86_64-linux]
+      - check-success=package disko-doc [x86_64-linux]
+      - check-success=package linux-bcachefs [x86_64-linux]
+defaults:
+  actions:
+    queue:
+      allow_merging_configuration_change: true
+pull_request_rules:
+  - name: merge using the merge queue
+    conditions:
+      - base=master
+      - label=merge-queue
+    actions:
+      queue: {}