Fix CI failures on master and add workflow_dispatch to all workflows

This commit addresses two critical CI issues:

1. **Fix generator validation failing in CI**:
   - The rake task that generates example apps was calling `rails generate`
     as a shell command, which spawned a new process without the
     REACT_ON_RAILS_SKIP_VALIDATION environment variable set
   - Modified shakapacker_examples.rake to prefix generator commands with
     the ENV variable so validation is skipped during npm package installation
   - This resolves the "No React on Rails npm package is installed" error
     that was breaking the examples workflow on master

2. **Add workflow_dispatch to all CI workflows**:
   - Added workflow_dispatch trigger to enable manual workflow runs on any
     branch via GitHub Actions UI
   - This makes CI testing more flexible and allows developers to test
     changes on feature branches without needing to open a PR
   - Updated workflows: main.yml, lint-js-and-ruby.yml,
     rspec-package-specs.yml, package-js-tests.yml, pro-integration-tests.yml,
     pro-package-tests.yml, pro-lint.yml

The generator validation fix complements the existing skip logic added in
PR #1923 which only handled direct generator invocations, not shell command
invocations.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: justin808

.github/workflows/lint-js-and-ruby.yml

@@ -11,6 +11,7 @@ on:
     paths-ignore:
       - '**.md'
       - 'docs/**'
+  workflow_dispatch:
 
 jobs:
   detect-changes:

.github/workflows/main.yml

@@ -11,6 +11,7 @@ on:
     paths-ignore:
       - '**.md'
       - 'docs/**'
+  workflow_dispatch:
 
 jobs:
   detect-changes:

.github/workflows/package-js-tests.yml

@@ -15,6 +15,7 @@ on:
       - 'docs/**'
       - 'lib/**'
       - 'spec/react_on_rails/**'
+  workflow_dispatch:
 
 jobs:
   detect-changes:

.github/workflows/pro-integration-tests.yml

@@ -5,6 +5,7 @@ on:
     branches:
       - 'master'
   pull_request:
+  workflow_dispatch:
 
 defaults:
   run:

.github/workflows/pro-lint.yml

@@ -5,6 +5,7 @@ on:
     branches:
       - 'master'
   pull_request:
+  workflow_dispatch:
 
 defaults:
   run:

.github/workflows/pro-package-tests.yml

@@ -5,6 +5,7 @@ on:
     branches:
       - 'master'
   pull_request:
+  workflow_dispatch:
 
 defaults:
   run:

.github/workflows/rspec-package-specs.yml

@@ -15,6 +15,7 @@ on:
       - 'docs/**'
       - 'packages/react-on-rails/src/**'
       - 'node_package/src/**'
+  workflow_dispatch:
 
 jobs:
   detect-changes:

rakelib/shakapacker_examples.rake

@@ -37,7 +37,11 @@ namespace :shakapacker_examples do # rubocop:disable Metrics/BlockLength
       sh_in_dir(example_type.dir, "echo \"gem 'shakapacker', '>= 8.2.0'\" >> #{example_type.gemfile}")
       bundle_install_in(example_type.dir)
       sh_in_dir(example_type.dir, "rake shakapacker:install")
-      sh_in_dir(example_type.dir, example_type.generator_shell_commands)
+      # Set ENV variable to skip validation during generator run since npm package isn't installed yet
+      generator_commands = example_type.generator_shell_commands.map do |cmd|
+        "REACT_ON_RAILS_SKIP_VALIDATION=true #{cmd}"
+      end
+      sh_in_dir(example_type.dir, generator_commands)
       sh_in_dir(example_type.dir, "yarn")
     end
   end