Update all examples with Compose Application DSL

examples/codeviewer/README.md

examples/codeviewer/build.gradle.kts

examples/codeviewer/desktop/build.gradle.kts

examples/imageviewer/README.md

examples/imageviewer/build.gradle.kts

examples/issues/README.md

examples/issues/build.gradle.kts

examples/issues/desktop/build.gradle.kts

examples/todoapp/README.md

examples/todoapp/buildSrc/build.gradle.kts

examples/todoapp/desktop/build.gradle.kts

templates/desktop-template/README.md

templates/desktop-template/build.gradle.kts

templates/desktop-template/settings.gradle.kts

templates/multiplatform-template/README.md

templates/multiplatform-template/build.gradle.kts

templates/multiplatform-template/desktop/build.gradle.kts