Added java bindings (#4016)

* Java bindings: Consolidate generated API and utilities

* Java bindings: Added multi-file output

* Java bindings: Introduced module-info.java for JPMS support

* Docs: Added link to Java API bindings in overview and README

bindings/java/module-info.java

@@ -0,0 +1,16 @@
+// Copyright 2011-2026 Branimir Karadzic. All rights reserved.
+// License: https://github.com/bkaradzic/bgfx/blob/master/LICENSE
+
+/**
+ * Java Foreign Function and Memory API bindings for the bgfx C99 API.
+ *
+ * <p>Native entry points and supporting types are in
+ * {@link io.github.bkaradzic.bgfx}. Load a compatible bgfx native library
+ * before invoking native methods. When running on the module path, enable
+ * native access with {@code --enable-native-access=io.github.bkaradzic.bgfx}.
+ */
+module io.github.bkaradzic.bgfx {
+	requires static transitive org.jspecify;
+
+	exports io.github.bkaradzic.bgfx;
+}