[guides] Updating VisiData Documentation

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Guide to writing guides

• GuideIndex: A Guide to VisiData Guides (you are here)
• HelpGuide: Where to Start and How to Quit
• MenuGuide: The VisiData Menu System (@anjakefala)
• CommandsSheet: How to find the command you want to run (@thejud)

Barebones Basics

• MovementGuide: Movement and search
• InputGuide: Input keystrokes
• SortGuide: Sorting (@saulbert)
• ColumnsGuide: Rename, hide, and resize columns (@thejud)
• TypesSheet: Column types (@reagle)

Let's Rev VisiData Up

• SelectionGuide: Selecting and filtering (@anjakefala)
• ColumnsSheet: Columns: the only way to fly
• StatusesSheet: Revisit old status messages
• SidebarSheet: Dive into the sidebar
• SaversGuide: Saving Data
• ErrrorsSheet: What was that error? (@anjakefala)
• ModifyGuide: Adding, Editing, Deleting Rows (@thejud)

The Varieties of Data Experience

• SlideGuide: Sliding rows and columns around (@thejud)
• ExprGuide: Compute Python over every row
• JoinGuide: Joining multiple sheets together
  • vd.help_join: Quick reference help sidebar available during Join command #1961
• DescribeSheet: Basic Statistics (min/max/mode/median/mean)
• AggregatorsSheet: Aggregations like sum, mean, and distinct
• FrequencyTable: Frequency Tables are how you GROUP BY (@thejud)
• PivotGuide: Pivot Tables are just Frequency Tables with more columns (@thejud)
• MeltGuide: Melt is just Unpivot (@thejud)
• JsonSheet: Some special features for JSON (@ajkerrigan)
• RegexGuide: Matching and Transforming Strings with Regex
• GraphSheet: Basic scatterplots and other graphs
• WindowFunctionGuide: Perform operations on groups of rows

For the Frequent User

• OptionsSheet: Options and Settings
• ClipboardGuide: Copy and Paste Data via the Clipboard (@thejud)
• DirSheet: Browsing the local filesystem (@anjakefala)
• FormatsSheet: What can you open with VisiData?
• SplitpaneGuide: Split VisiData into two panes (@thejud)
• ThemesSheet: Change Interface Theme
• ColorSheet: See available colors
• MacrosSheet: Recording macros (@anjakefala)
• MemorySheet: Making note of certain values (@thejud)

Specific Use Cases

• XsvGuide: CSV/TSV and other text-delimited formats (@saulpw)

Advanced Usage and Developers

• ThreadsSheet: Threads past and present
• DeveloperGuide: Inspecting internal Python objects

Appendices

• InputEditorGuide: Using the builtin line editor