This implements [\[format.string.escaped\]], which is part of WG21-P2286R8 "Formatting Ranges" and modified by WG21-P2713R1 "Escaping Improvements In `std::format`". Works towards #2919.

To implement this feature, two arrays, `__printable_ranges` and `_Grapheme_Extend_ranges`, are added to `__msvc_format_ucd_tables.hpp`.

- `__printable_ranges` represents code points whose [`General_Category`] is in the groups `L`, `M`, `N`, `P`, `S` (that is, code points that are *not* from categories `Z` or `C`), plus the ASCII space character.
  - Characters outside of these ranges are always escaped, usually using the `\u{hex-digit-sequence}` format. ([\[format.string.escaped\]/(2.2.1.2.1)])
  - It might make sense to store the unmodified `General_Category`, instead of this invented property. This requires more storage and a new data structure, though.
- `_Grapheme_Extend_ranges` represents code points with the Unicode property `Grapheme_Extend=Yes`.
  - Characters in these ranges are escaped unless they immediately follow an unescaped character. ([\[format.string.escaped\]/(2.2.1.2.2)])
  - It would be more space efficient to reuse the existing data for `Grapheme_Cluster_Break`: `Grapheme_Extend=Yes` is `Grapheme_Cluster_Break=Extend` minus `Emoji_Modifier=Yes`, and `Emoji_Modifier=Yes` is just `1F3FB..1F3FF`. I chose to define a new array for simplicity.

When the literal encoding is not UTF-8, UTF-16, or UTF-32, the set of "separator or non-printable characters" is implementation-defined. In this implementation, the set consists of all characters that correspond to non-printable Unicode code points (that is, code points outside of `__printable_ranges`, see above). If a character is non-printable, it is translated into `\u{XXXX}`, where `XXXX` is the hex value of the Unicode code point (not the original value).

If a code unit sequence cannot be converted to a Unicode scalar value, the `\x{XX}` escape sequence is used.

[`General_Category`]: https://www.unicode.org/reports/tr44/#GC_Values_Table
[\[format.string.escaped\]]: http://eel.is/c++draft/format.string.escaped
[\[format.string.escaped\]/(2.2.1.2.1)]: http://eel.is/c++draft/format.string.escaped#2.2.1.2.1
[\[format.string.escaped\]/(2.2.1.2.2)]: http://eel.is/c++draft/format.string.escaped#2.2.1.2.2

* This PR implements debug-enabled standard `formatter` specializations,
* Drive-by: rename tests added in microsoft#3656 - use `text_formatting_` prefix instead of `formatting_ranges_` (for consistency),
* Towards microsoft#2919.

* This PR implements debug-enabled standard `formatter` specializations,
* Drive-by: rename tests added in microsoft#3656 - use `text_formatting_` prefix instead of `formatting_ranges_` (for consistency),
* Towards microsoft#2919.