conf(vscode): adds launch and settings for packages-template folder

adds the vscode settings so that one can run debug and test using IDE from the packages-template folder

packages-template/.vscode/launch.json

+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "java",
+            "name": "Current File",
+            "request": "launch",
+            "mainClass": "${file}"
+        },
+        {
+            "type": "java",
+            "name": "Launch packages-template - single-module, multi-package",
+            "request": "launch",
+            "mainClass": "app/ui.App",
+            "vmArgs": ["--add-opens", "app/core=ALL-UNNAMED","--add-opens", "app/ui=ALL-UNNAMED", "--add-exports", "javafx.graphics/com.sun.javafx.application=ALL-UNNAMED"],
+            "projectName": "packages-template"
+        }
+    ]
+}
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packages-template/.vscode/settings.json

+{
+    "java.configuration.updateBuildConfiguration": "automatic",
+    "[java]": {
+        "editor.tabSize": 2
+    },
+    "java.test.config": [
+        {
+            "name": "coreTesting",
+            "vmArgs": []
+        },
+        {
+            "name": "packages-template testing",
+            "vmArgs": ["--add-opens", "app/core=ALL-UNNAMED","--add-opens", "app/ui=ALL-UNNAMED", "--add-exports", "javafx.graphics/com.sun.javafx.application=ALL-UNNAMED"]
+        }
+    ],
+    "java.test.defaultConfig": "packages-template testing",
+    "java.compile.nullAnalysis.mode": "automatic",
+    "java.debug.settings.onBuildFailureProceed": true
+}
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