Added a preview of the document analysis assistant (#561)

Co-authored-by: Peer Schütt <20603780+peerschuett@users.noreply.github.com>

app/MindWork AI Studio/Dialogs/PandocDocumentCheckDialog.razor

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+@inherits MSGComponentBase
+
+
+<MudDialog>
+    <DialogContent>
+        <PreviewPrototype/>
+        
+        <MudJustifiedText Typo="Typo.body1" Class="mb-3">
+            @T("Test how Pandoc loads your document. See the raw content it produces before further processing.")
+        </MudJustifiedText>
+
+        <ReadFileContent Text="@T("Load document")" @bind-FileContent="@this.documentContent"/>
+
+        <MudTextField
+            T="string"
+            @bind-Text="@this.documentContent"
+            AdornmentIcon="@Icons.Material.Filled.Article"
+            Adornment="Adornment.Start"
+            Immediate="@true"
+            Label="@T("Content Loaded by Pandoc")"
+            Variant="Variant.Outlined"
+            Lines="6"
+            AutoGrow="@true"
+            MaxLines="25"
+            Class="mt-10"
+            HelperText="@T("This is the content Pandoc loaded from your document — including headings, lists, and formatting. Use this to verify your document loads as expected.")"
+        />
+    </DialogContent>
+    <DialogActions>
+        <MudButton OnClick="@this.Cancel" Variant="Variant.Filled">
+            @T("Cancel")
+        </MudButton>
+    </DialogActions>
+</MudDialog>

app/MindWork AI Studio/Dialogs/PandocDocumentCheckDialog.razor.cs

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+using System.Formats.Asn1;
+using AIStudio.Components;
+
+using Microsoft.AspNetCore.Components;
+
+namespace AIStudio.Dialogs;
+
+/// <summary>
+/// Check how your file will be loaded by Pandoc.
+/// </summary>
+public partial class PandocDocumentCheckDialog : MSGComponentBase
+{
+    [CascadingParameter]
+    private IMudDialogInstance MudDialog { get; set; } = null!;
+
+    
+    private string documentContent = string.Empty;
+    
+    private void Cancel() => this.MudDialog.Cancel();
+}

app/MindWork AI Studio/Dialogs/Settings/SettingsDialogDocumentAnalysis.razor

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+@using AIStudio.Settings
+@inherits SettingsDialogBase
+
+<MudDialog>
+    <TitleContent>
+        <PreviewPrototype/>
+        <MudText Typo="Typo.h6" Class="d-flex align-center">
+            <MudIcon Icon="@Icons.Material.Filled.DocumentScanner" Class="mr-2"/>
+            @T("Assistant: Document Analysis")
+        </MudText>
+    </TitleContent>
+    <DialogContent>
+        <MudPaper Class="pa-3 mb-8 border-dashed border rounded-lg">
+            <ConfigurationOption OptionDescription="@T("Preselect document analysis options?")" LabelOn="@T("Document analysis options are preselected")" LabelOff="@T("No document analysis options are preselected")" State="@(() => this.SettingsManager.ConfigurationData.ERI.PreselectOptions)" StateUpdate="@(updatedState => this.SettingsManager.ConfigurationData.ERI.PreselectOptions = updatedState)" OptionHelp="@T("When enabled, you can preselect some document analysis options.")"/>
+            <ConfigurationMinConfidenceSelection Disabled="@(() => !this.SettingsManager.ConfigurationData.ERI.PreselectOptions)" RestrictToGlobalMinimumConfidence="@true" SelectedValue="@(() => this.SettingsManager.ConfigurationData.ERI.MinimumProviderConfidence)" SelectionUpdate="@(selectedValue => this.SettingsManager.ConfigurationData.ERI.MinimumProviderConfidence = selectedValue)"/>
+            <ConfigurationSelect OptionDescription="@T("Preselect one of your profiles?")" Disabled="@(() => !this.SettingsManager.ConfigurationData.ERI.PreselectOptions)" SelectedValue="@(() => this.SettingsManager.ConfigurationData.ERI.PreselectedProfile)" Data="@ConfigurationSelectDataFactory.GetProfilesData(this.SettingsManager.ConfigurationData.Profiles)" SelectionUpdate="@(selectedValue => this.SettingsManager.ConfigurationData.ERI.PreselectedProfile = selectedValue)" OptionHelp="@T("Would you like to preselect one of your profiles?")"/>
+
+            <MudText Typo="Typo.body1" Class="mb-3">
+                @T("Most document analysis options can be customized and saved directly in the assistant. For this, the assistant has an auto-save function.")
+            </MudText>
+        </MudPaper>
+    </DialogContent>
+    <DialogActions>
+        <MudButton OnClick="@this.Close" Variant="Variant.Filled">
+            @T("Close")
+        </MudButton>
+    </DialogActions>
+</MudDialog>

app/MindWork AI Studio/Dialogs/Settings/SettingsDialogDocumentAnalysis.razor.cs

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+namespace AIStudio.Dialogs.Settings;
+
+public partial class SettingsDialogDocumentAnalysis : SettingsDialogBase;