add ci config

Signed-off-by: oppiliappan <[e-mail]>

.tangled/workflows/build.yml

···
+when:
+  - event: push
+    branch: main
+
+dependencies:
+  nixpkgs:
+    - gcc
+    - cargo
+    - rustc
+    - rustfmt
+
+steps:
+  - name: build
+    command: |
+       cargo build --all --verbose
+
+

.tangled/workflows/fmt.yml

···
+when:
+  - event: push
+    branch: main
+
+dependencies:
+  nixpkgs:
+    - cargo
+    - rustc
+    - rustfmt
+
+steps:
+  - name: build
+    command: |
+       cargo fmt --check --all --verbose
+
+
+

src/fs.rs

···
-use std::{
-    collections::{BTreeMap, hash_set::Iter},
-    time,
-};
+use std::time;
 
 use atrium_repo::{Repository, blockstore::AsyncBlockStoreRead};
 use futures::StreamExt;

src/main.rs

···
 use atrium_repo::{Repository, blockstore::CarStore};
 use atrium_xrpc_client::isahc::IsahcClient;
 use fuser::MountOption;
-use futures::{Stream, StreamExt, TryStream, TryStreamExt, stream};
+use futures::{StreamExt, stream};
 use indicatif::{MultiProgress, ProgressBar, ProgressStyle};
 use std::{
     collections::HashMap,