WIP: docs(fs): add some documentation

.woodpecker.yml

@@ -2,7 +2,7 @@ steps:
   update-builder-image:
     when:
       - event: cron
-    image: docker.io/woodpeckerci/plugin-docker-buildx:5.0
+    image: docker.io/woodpeckerci/plugin-docker-buildx:4.2
     settings:
       username: kemitix
       repo: git.kemitix.net/kemitix/kxio-builder
@@ -53,7 +53,7 @@ steps:
   publish_to_crates_io:
     when:
       - event: tag
-    image: docker.io/rust:1.82
+    image: docker.io/rust:1.81
     commands:
       - cargo login "$CARGO_REGISTRY_TOKEN"
       - cargo publish --registry crates-io --no-verify