Overhaul LibationCli

Add version verb with option to check for upgrade
Add Search verb to search the library
Add export file type inference
Add more set-status options
Add console progress bar and ETA
Add processable option to liberate specific book IDs
Scan accounts by nickname or account ID
Improve startup performance for halp and on parsing error
More useful error messages

Source/LibationCli/ConsoleProgressBar.cs

@@ -0,0 +1,77 @@
+using System;
+using System.IO;
+
+namespace LibationCli;
+
+internal class ConsoleProgressBar
+{
+	public TextWriter Output { get; }
+	public int MaxWidth { get; }
+	public char ProgressChar { get; }
+	public char NoProgressChar { get; }
+
+	public double? Progress
+	{
+		get => m_Progress;
+		set
+		{
+			m_Progress = value ?? 0;
+			WriteProgress();
+		}
+	}
+
+	public TimeSpan RemainingTime
+	{
+		get => m_RemainingTime;
+		set
+		{
+			m_RemainingTime = value;
+			WriteProgress();
+		}
+	}
+
+
+	private double m_Progress;
+	private TimeSpan m_RemainingTime;
+	private int m_LastWriteLength = 0;
+	private const int MAX_ETA_LEN = 10;
+	private readonly int m_NumProgressPieces;
+
+	public ConsoleProgressBar(
+		TextWriter output,
+		int maxWidth = 80,
+		char progressCharr = '#',
+		char noProgressChar = '.')
+	{
+		Output = output;
+		MaxWidth = maxWidth;
+		ProgressChar = progressCharr;
+		NoProgressChar = noProgressChar;
+		m_NumProgressPieces = MaxWidth - MAX_ETA_LEN - 4;
+	}
+
+	private void WriteProgress()
+	{
+		var numCompleted = (int)Math.Round(double.Min(100, m_Progress) * m_NumProgressPieces / 100);
+		var numRemaining = m_NumProgressPieces - numCompleted;
+		var progressBar = $"[{new string(ProgressChar, numCompleted)}{new string(NoProgressChar, numRemaining)}]  ";
+
+		progressBar += RemainingTime.TotalMinutes > 1000
+			? "ETA ∞"
+			: $"ETA {(int)RemainingTime.TotalMinutes}:{RemainingTime.Seconds:D2}";
+
+		Output.Write(new string('\b', m_LastWriteLength) + progressBar);
+		if (progressBar.Length < m_LastWriteLength)
+		{
+			var extra = m_LastWriteLength - progressBar.Length;
+			Output.Write(new string(' ', extra) + new string('\b', extra));
+		}
+		m_LastWriteLength = progressBar.Length;
+	}
+
+	public void Clear()
+		=> Output.Write(
+			new string('\b', m_LastWriteLength)
+			+ new string(' ', m_LastWriteLength)
+			+ new string('\b', m_LastWriteLength));
+}