♻️ Refactor websockets impl to use virtual threads

Removing the use of core.async code and implement code using
plain old and familiar synchronous code

backend/scripts/repl

@@ -42,6 +42,9 @@ export PENPOT_ASSETS_STORAGE_BACKEND=assets-s3
 export PENPOT_STORAGE_ASSETS_S3_ENDPOINT=http://minio:9000
 export PENPOT_STORAGE_ASSETS_S3_BUCKET=penpot
 
+#-J-Djdk.virtualThreadScheduler.parallelism=16
+
+
 export OPTIONS="
        -A:jmx-remote -A:dev \
        -J-Djava.util.logging.manager=org.apache.logging.log4j.jul.LogManager \
@@ -49,7 +52,9 @@ export OPTIONS="
        -J-Dlog4j2.configurationFile=log4j2-devenv.xml \
        -J-XX:-OmitStackTraceInFastThrow \
        -J-XX:+UnlockDiagnosticVMOptions \
-       -J-XX:+DebugNonSafepoints";
+       -J-XX:+DebugNonSafepoints \
+       -J-Djdk.tracePinnedThreads=full \
+       -J--enable-preview";
 
 # Setup HEAP
 export OPTIONS="$OPTIONS -J-Xms50m -J-Xmx1024m"