Nearest Neighbor solver, basic caching

Add a nearest neighbor solver (WriteAwareBruteSolver) and some basic
caching to the Java API adapter.

Fix a comment typo with an off-by-one error

build.gradle.kts

@@ -13,6 +13,7 @@ repositories {
 
 dependencies {
     implementation(project(":padlock-impl"))
+    implementation("org.apache.commons", "commons-text", "1.11.0")
     // if you ever need import more dependencies, following this format:
     // implementation("group-id:project-id:version")
     // just like the logback classic