Add rake build task and update related scripts to use it

- Introduced a new rake build task that delegates to build_stub.
- Updated GitHub Actions and bin/setup scripts to use rake build instead of rake build_stub.
- This simplifies the developer interface and centralizes future build logic.

Author: shinokaro

.github/workflows/test-on-push.yml

@@ -21,5 +21,5 @@ jobs:
 
       - name: Build stub and run tests
         run: |
-          bundle exec rake build_stub 
+          bundle exec rake build
           bundle exec rake test

.github/workflows/windows-gem-release.yml

@@ -17,7 +17,7 @@ jobs:
 
       - name: Build stub and run tests 
         run: |
-          bundle exec rake build_stub 
+          bundle exec rake build
           bundle exec rake test
 
       - name: Build Gem 

Rakefile

@@ -14,6 +14,9 @@ STUB_NAMES = %w[stub stubw edicon]
 STUB_DIR   = "share/ocran"
 BUILD_DIR  = "src"
 
+desc "Builds all necessary artifacts (currently stubs)"
+task :build => :build_stub
+
 task :build_stub do
   sh "ridk exec make -C #{BUILD_DIR}"
   STUB_NAMES.each do |name|

bin/setup

@@ -4,4 +4,4 @@ IFS=$'\n\t'
 set -vx
 
 bundle install
-bundle exec rake build_stub
+bundle exec rake build

bin/setup.bat

@@ -19,7 +19,7 @@ if errorlevel 1 (
 
 echo == Building stub executables ==
 
-call bundle exec rake build_stub
+call bundle exec rake build
 if errorlevel 1 (
   echo Failed to build stubs.
   exit /b 1