fix: simplify lint and format workflow

.github/workflows/validate-json.yml

@@ -0,0 +1,26 @@
+name: validate-json
+on:
+  push:
+    branches:
+      - "**"
+
+  pull_request:
+    types:
+      - opened
+      - synchronize
+
+jobs:
+  format:
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout code
+        uses: actions/checkout@v4
+
+      - uses: cashapp/activate-hermit@v1
+        name: setup hermit with `just` and `jq`
+        with:
+          cache: true
+
+      - name: format json files
+        id: format-json
+        run: just format

bin/.just-1.34.0.pkg

@@ -0,0 +1 @@
+hermit

bin/just

@@ -0,0 +1 @@
+.just-1.34.0.pkg

hooks/pre-commit

@@ -1,8 +1,6 @@
 #!/usr/bin/env bash
 
-if just lint; then
-  echo "[success] linting passed"
-else
+if ! just format; then
   echo "[error] linting failed"
   exit 1
 fi