file drop support

- Add a folder where you can drop Zip files which will then be
  extracted on the fly and ingsted.
- CsvReaderSettings now contain TagMatcher that are applied to the
  first line and can be used to extract additional tags.
- Update to jdk 16 so that we can have records.

pdb-ui/src/main/java/org/lucares/pdbui/domain/FileDropConfig.java

@@ -0,0 +1,31 @@
+package org.lucares.pdbui.domain;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.commons.lang3.StringUtils;
+
+public class FileDropConfig {
+    private List<FileDropSettings> settings = new ArrayList<>();
+
+    public List<FileDropSettings> getSettings() {
+        return settings;
+    }
+
+    public void setSettings(final List<FileDropSettings> settings) {
+        this.settings = settings;
+    }
+
+    @Override
+    public String toString() {
+        final StringBuilder builder = new StringBuilder();
+        builder.append("FileDropConfig [");
+        if (settings != null) {
+            builder.append("\nsettings=");
+            builder.append(StringUtils.join(settings, "\n"));
+        }
+        builder.append("]");
+        return builder.toString();
+    }
+
+}

pdb-ui/src/main/java/org/lucares/pdbui/domain/FileDropSettings.java

@@ -0,0 +1,7 @@
+package org.lucares.pdbui.domain;
+
+import org.lucares.pdbui.CsvReaderSettings;
+
+public record FileDropSettings(String match, CsvReaderSettings csvSettings) {
+
+}

pdb-ui/src/main/java/org/lucares/pdbui/domain/TagMatcher.java

@@ -0,0 +1,9 @@
+package org.lucares.pdbui.domain;
+
+/**
+ * @param regex a regular expression with one catching group, e.g.
+ *              "BUILD='([a-zA-Z]+_\\d+\\.\\d_\\d+)"
+ * @param tag   the tag, e.g. "build"
+ */
+public record TagMatcher(String regex, String tag) {
+}