Make bulk registration CSV import more user-friendly (#411)

* Refactor CSV import

* Finish refactoring

* Add types file

* update readme

src/components/user-import/UserImport.tsx

@@ -0,0 +1,51 @@
+import {
+  Stack,
+} from "@mui/material";
+import { useTranslate } from "ra-core";
+import { Title } from "react-admin";
+
+import UploadCard from "./UploadCard";
+import useImportFile from "./useImportFile";
+import ErrorsCard from "./ErrorsCard";
+import ConflictModeCard from "./ConflictModeCard";
+import StatsCard from "./StatsCard";
+import StartImportCard from "./StartImportCard";
+import ResultsCard from "./ResultsCard";
+
+const UserImport = () => {
+  const {
+    csvData,
+    dryRun,
+    importResults,
+    progress,
+    errors,
+    stats,
+    conflictMode,
+    passwordMode,
+    useridMode,
+    onFileChange,
+    onDryRunModeChanged,
+    runImport,
+    onConflictModeChanged,
+    onPasswordModeChange,
+    onUseridModeChanged,
+    downloadSkippedRecords
+  } = useImportFile();
+
+  const translate = useTranslate();
+
+  return (
+    <Stack spacing={3} mt={3} direction="column">
+        <Title defaultTitle={translate("import_users.title")} />
+        <UploadCard importResults={importResults} onFileChange={onFileChange} progress={progress} />
+        <ErrorsCard errors={errors} />
+        <ConflictModeCard stats={stats} importResults={importResults} conflictMode={conflictMode} onConflictModeChanged={onConflictModeChanged} progress={progress} />
+        <StatsCard stats={stats} progress={progress} importResults={importResults} passwordMode={passwordMode} useridMode={useridMode} onPasswordModeChange={onPasswordModeChange} onUseridModeChanged={onUseridModeChanged} />
+        <StartImportCard csvData={csvData} importResults={importResults} progress={progress} dryRun={dryRun} onDryRunModeChanged={onDryRunModeChanged} runImport={runImport} />
+        <ResultsCard importResults={importResults} downloadSkippedRecords={downloadSkippedRecords} />
+    </Stack>
+  );
+
+};
+
+export default UserImport;