feat(import): read the exports of GOG Galaxy, Grouvee, HowLongToBeat and Playnite

public/i18n/en.json

@@ -641,7 +641,7 @@
     "TEXT_LABEL": "Game titles",
     "TEXT_PLACEHOLDER": "One game per line",
     "CSV_LABEL": "CSV file",
-    "CSV_HINT": "First row with column names: title (or name), platform, hours (or minutes), status.",
+    "CSV_HINT": "First row with column names: title (or name), platform, hours (or minutes), status. Exports of GOG Galaxy, Grouvee, HowLongToBeat and Playnite are read as they are.",
     "CSV_NO_TITLE": "The file has no title or name column.",
     "LINES": "{{count}} lines",
     "TOO_MANY": "{{count}} lines: at most {{max}} per import.",
@@ -705,7 +705,13 @@
     "FAILED": "The import stopped after {{count}} tries.",
     "RETRY": "Try again",
     "RETRY_FAILED": "Could not start the import again.",
-    "ATTEMPT": "Try {{attempt}}: the last try made no progress."
+    "ATTEMPT": "Try {{attempt}}: the last try made no progress.",
+    "SOURCE_GALAXY": "GOG Galaxy",
+    "SOURCE_GROUVEE": "Grouvee",
+    "SOURCE_HLTB": "HowLongToBeat",
+    "SOURCE_PLAYNITE": "Playnite",
+    "SOURCE_BOOKMARKLET": "Store page",
+    "FORMAT_READ": "Read as: {{format}}"
   },
   "UNSAVED_CHANGES": {
     "CONFIRM": "You have changes that are not saved. Leave this page and lose them?"