feat: Add JPMS module descriptor for org.egothor.radixor

docs/programmatic-usage.md

@@ -41,6 +41,24 @@ The main types involved in programmatic usage are:
 - `FrequencyTrieBuilders` for reconstructing a mutable builder from a compiled trie,
 - `ReductionMode` and `ReductionSettings` for controlling compilation semantics.
 
+## Java module system (JPMS)
+
+The core artifact is published as an explicit JPMS module:
+
+```java
+module org.egothor.radixor;
+```
+
+A named consuming module uses:
+
+```java
+module example.consumer {
+    requires org.egothor.radixor;
+}
+```
+
+The core module is standalone and can be consumed directly as a normal Java module.
+
 ## Recommended reading order
 
 For most developers, the best order is:

src/main/java/module-info.java

@@ -0,0 +1,5 @@
+module org.egothor.radixor {
+    requires java.logging;
+
+    exports org.egothor.stemmer;
+}