feat: add git hook (lefthook)

And remove Makefile

lefthook.yaml

@@ -0,0 +1,26 @@
+---
+commit-msg:
+  parallel: true
+  commands:
+
+    lint:convco:
+      run: cat {1} | convco check --from-stdin
+    
+    lint:typos:
+      run: cat {1} | typos -
+
+pre-commit:
+  parallel: true
+  commands:
+    
+    nixcheck:
+      glob: "flake.{nix,lock}"
+      run: nix flake check
+    
+    shellcheck:
+      glob: "*.sh"
+      run: shellcheck {staged_files}
+    
+    shfmt:
+      glob: "*.sh"
+      run: shfmt -d -ln bash -i 4 {staged_files}