Add support for distributed CSRF tokens (via persistence)

Current standard CSRF functionality is default, with the distributed CSRF tokens able to be enabled through distributed mode flag. Additionally, adding persistence DTO to your default datasource and adding the subsequent table to your database is required. Some extra code is required to enable this functionality on a non-default datasource.

Ported some code for centralized date time functionalities to standardize access to zoned datetimes.

core/src/main/java/org/eclipsefoundation/core/config/CSRFGeneratorProvider.java

+package org.eclipsefoundation.core.config;
+
+import javax.enterprise.context.Dependent;
+import javax.enterprise.inject.Produces;
+
+import org.eclipsefoundation.core.model.CSRFGenerator;
+import org.eclipsefoundation.core.model.CSRFGenerator.DefaultCSRFGenerator;
+
+import io.quarkus.arc.DefaultBean;
+import io.quarkus.arc.Unremovable;
+
+/**
+ * Allows for the implementation of other mechanisms to provide CSRF tokens while enabling a default mechanism which
+ * uses random values at runtime to create sufficiently hardened values.
+ * 
+ * @author Martin Lowe
+ *
+ */
+@Dependent
+@Unremovable
+public class CSRFGeneratorProvider {
+
+    @Produces
+    @DefaultBean
+    public CSRFGenerator generator() {
+        return new DefaultCSRFGenerator();
+    }
+}