Add initial configs for obsidian and copy logic for files

obsidian seems to only have a per-vault config approach, so my approach
is to define settings within .config/obsidian, then copy to vault dirs

src_files/.config/obsidian/app.json

@@ -0,0 +1,17 @@
+{
+  "defaultViewMode": "preview",
+  "showLineNumber": true,
+  "spellcheck": false,
+  "autoPairBrackets": false,
+  "autoPairMarkdown": false,
+  "useTab": false,
+  "autoConvertHtml": false,
+  "vimMode": true,
+  "trashOption": "none",
+  "newFileLocation": "folder",
+  "newFileFolderPath": "inbox",
+  "showUnsupportedFiles": true,
+  "attachmentFolderPath": "inbox",
+  "showInlineTitle": false,
+  "readableLineLength": false
+}