Chore/upgrade rails to 8

.claude/settings.local.json

@@ -0,0 +1,16 @@
+{
+  "permissions": {
+    "allow": [
+      "Bash(find:*)",
+      "Bash(bundle exec rspec:*)",
+      "Bash(mkdir:*)",
+      "Bash(rspec:*)",
+      "Bash(bundle install:*)",
+      "Bash(ruby:*)",
+      "Bash(gem which:*)",
+      "Bash(bundle:*)"
+    ],
+    "deny": [],
+    "ask": []
+  }
+}

.github/workflows/ci.yml

@@ -0,0 +1,52 @@
+name: CI
+
+on:
+  push:
+    branches: [ master, main ]
+  pull_request:
+    branches: [ master, main ]
+
+jobs:
+  rubocop:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        ruby-version: ['3.2']
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Set up Ruby ${{ matrix.ruby-version }}
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: ${{ matrix.ruby-version }}
+        bundler-cache: true
+
+    - name: Install dependencies
+      run: bundle install
+
+    - name: Run RuboCop
+      run: bundle exec rubocop
+
+  rspec:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        ruby-version: ['3.2']
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Set up Ruby ${{ matrix.ruby-version }}
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: ${{ matrix.ruby-version }}
+        bundler-cache: true
+
+    - name: Install dependencies
+      run: bundle install
+
+    - name: Run RSpec tests
+      run: bundle exec rspec

.rubocop.yml

@@ -1,29 +1 @@
 inherit_from: .rubocop_todo.yml
-
-# Offense count: 1
-Security/Eval:
-  Exclude:
-    - 'bin/*'
-
-# Configuration parameters: AllowHeredoc, AllowURI, URISchemes, IgnoreCopDirectives, IgnoredPatterns.
-# URISchemes: http, https
-Metrics/LineLength:
-  Max: 120
-
-Metrics/BlockLength:
-  ExcludedMethods: ['describe', 'context']
-
-Style/AsciiComments:
-  Enabled: false
-
-Style/Copyright:
-  Notice: 'Copyright (\(c\) )?2[0-9]{3} .+'
-  AutocorrectNotice: "# Copyright (c) 2018 FINFEX https://github.com/finfex\n"
-  Description: 'Include a copyright notice in each file before any code.'
-  Enabled: true
-  VersionAdded: '0.1'
-
-AllCops:
-  Exclude:
-    - utils/*
-    - vendor/bundle/**/*