add Info plist to mac resources

Based on https://hg.openjdk.java.net/jdk/jdk/file/tip/src/jdk.incubator.jpackage/macosx/classes/jdk/incubator/jpackage/internal/resources/Runtime-Info.plist.template

build.gradle

@@ -667,6 +667,7 @@ jlink {
             installerOptions = [
                     '--vendor', 'JabRef',
                     '--app-version', "${project.version}",
+                    '--resource-dir', "${projectDir}/buildres/mac",
                     '--file-associations', "${projectDir}/buildres/mac/bibtexAssociations.properties"
             ]
         }

buildres/mac/Info.plist

@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "https://www.apple.com/DTDs/PropertyList-1.0.dtd">
+
+<plist version="1.0">
+
+<dict>
+
+        <key>CFBundleDevelopmentRegion</key>
+
+        <string>English</string>
+
+        <key>CFBundleExecutable</key>
+
+        <string>libjli.dylib</string>
+
+        <key>CFBundleIdentifier</key>
+
+        <string>CF_BUNDLE_IDENTIFIER</string>
+
+        <key>CFBundleInfoDictionaryVersion</key>
+
+        <string>7.0</string>
+
+        <key>CFBundleName</key>
+
+        <string>CF_BUNDLE_NAME</string>
+
+        <key>CFBundlePackageType</key>
+
+        <string>BNDL</string>
+
+        <key>CFBundleShortVersionString</key>
+
+        <string>CF_BUNDLE_SHORT_VERSION_STRING</string>
+
+        <key>CFBundleSignature</key>
+
+        <string>????</string>
+
+        <key>CFBundleVersion</key>
+
+        <string>CF_BUNDLE_VERSION</string>
+
+        <key>NSSupportsAutomaticGraphicsSwitching</key>
+        <true/>
+
+
+</dict>
+
+</plist>