Enforce required, optional, and rest positional arguments start with an uppercase and end with a period. (#11285)

# Description

This updates all the positional arguments (except with
`--features=dataframe` or `--features=extra`) to start with an uppercase
letter and end with a period.

Part of #5066, specifically [this
comment](/nushell/nushell/issues/5066#issuecomment-1421528910)

Some arguments had example data removed from them because it also
appears in the examples.

There are other inconsistencies in positional arguments I noticed while
making the tests pass which I will bring up in #5066.

# User-Facing Changes

Positional arguments are now consistent

# Tests + Formatting

- 🟢 `toolkit fmt`
- 🟢 `toolkit clippy`
- 🟢 `toolkit test`
- 🟢 `toolkit test stdlib`

# After Submitting

Automatic documentation updates

crates/nu-command/src/charting/histogram.rs

@@ -25,8 +25,8 @@ impl Command for Histogram {
     fn signature(&self) -> Signature {
         Signature::build("histogram")
             .input_output_types(vec![(Type::List(Box::new(Type::Any)), Type::Table(vec![])),])
-            .optional("column-name", SyntaxShape::String, "column name to calc frequency, no need to provide if input is just a list")
-            .optional("frequency-column-name", SyntaxShape::String, "histogram's frequency column, default to be frequency column output")
+            .optional("column-name", SyntaxShape::String, "Column name to calc frequency, no need to provide if input is a list.")
+            .optional("frequency-column-name", SyntaxShape::String, "Histogram's frequency column, default to be frequency column output.")
             .named("percentage-type", SyntaxShape::String, "percentage calculate method, can be 'normalize' or 'relative', in 'normalize', defaults to be 'normalize'", Some('t'))
             .category(Category::Chart)
     }