feat(gradle-lite): JS-based Gradle manager (#7521)

lib/manager/common.ts

lib/manager/gradle-lite/__snapshots__/parser.spec.ts.snap

lib/manager/gradle-lite/common.ts

lib/manager/gradle-lite/extract.spec.ts

lib/manager/gradle-lite/extract.ts

lib/manager/gradle-lite/index.ts

lib/manager/gradle-lite/parser.spec.ts

lib/manager/gradle-lite/parser.ts

lib/manager/gradle-lite/readme.md

lib/manager/gradle-lite/tokenizer.spec.ts

lib/manager/gradle-lite/tokenizer.ts

lib/manager/gradle-lite/update.spec.ts

lib/manager/gradle-lite/update.ts

lib/manager/gradle-lite/utils.spec.ts

lib/manager/gradle-lite/utils.ts

package.json

yarn.lock