feat(build): use Nix flake, go-task and lefthook

lefthook.yaml

@@ -0,0 +1,21 @@
+---
+skip_output: [meta, success]
+no_tty: true
+
+commit-msg:
+  commands:
+    lint:convco:
+      run: cat {1} | convco check --from-stdin
+    lint:typos:
+      run: cat {1} | typos -
+pre-commit:
+  parallel: false
+  commands:
+    lint:typos:staged_files:
+      run: typos {staged_files}
+pre-push:
+  parallel: false
+  commands:
+    check:nix:
+      tags: check
+      run: nix flake check