Add 10 popular Java repos to community index

spring-boot, spring-framework, guava, elasticsearch, kafka,
RxJava, retrofit, okhttp, netty, flink

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: codegraphtheory

repos.yaml

@@ -130,3 +130,53 @@ categories:
         description: "The web framework for content-driven websites"
         pill: "Meta-framework"
         pill_class: "pill-accent"
+      - name: spring-boot
+        upstream: spring-projects/spring-boot
+        description: "Build production-ready Spring applications with minimal configuration"
+        pill: "Java"
+        pill_class: "pill-orange"
+      - name: spring-framework
+        upstream: spring-projects/spring-framework
+        description: "The foundational framework for enterprise Java development"
+        pill: "Java"
+        pill_class: "pill-orange"
+      - name: guava
+        upstream: google/guava
+        description: "Google core libraries for Java — collections, caching, concurrency, and more"
+        pill: "Java"
+        pill_class: "pill-orange"
+      - name: elasticsearch
+        upstream: elastic/elasticsearch
+        description: "Free and open distributed search and analytics engine"
+        pill: "Java"
+        pill_class: "pill-orange"
+      - name: kafka
+        upstream: apache/kafka
+        description: "Distributed event streaming platform for high-performance data pipelines"
+        pill: "Java"
+        pill_class: "pill-orange"
+      - name: RxJava
+        upstream: ReactiveX/RxJava
+        description: "Reactive extensions for the JVM — composable asynchronous programming"
+        pill: "Java"
+        pill_class: "pill-orange"
+      - name: retrofit
+        upstream: square/retrofit
+        description: "A type-safe HTTP client for Android and Java"
+        pill: "Java"
+        pill_class: "pill-orange"
+      - name: okhttp
+        upstream: square/okhttp
+        description: "An efficient HTTP & HTTP/2 client for Android and Java"
+        pill: "Java"
+        pill_class: "pill-orange"
+      - name: netty
+        upstream: netty/netty
+        description: "Asynchronous event-driven network application framework for Java"
+        pill: "Java"
+        pill_class: "pill-orange"
+      - name: flink
+        upstream: apache/flink
+        description: "Stream processing framework for distributed, high-performing data pipelines"
+        pill: "Java"
+        pill_class: "pill-orange"