Add the sound information in text format for ⿻ symbols across the book

[akinorioyama]

The current parts and sections write the ⿻ character only in the form of symbol, and are missing its sound information. The adjustment is to add the pronounciation information for the ⿻ character. The index of the ⿻ character in the attachement file in subsequent conversation message can provide the information of the location, and the sound information from machine synthesized sound of the audiobook. The text changes in markdown files will be done in the way illustrated below.

The original text segment of the file, english/0-1-About-the-authors.md, below dozens of members of the ⿻plurality community to the aria-label enclosed segment below dozens of members of the <span aria-label="Plurality">⿻</span> community

This is intended to be uttered by screen reader applications like Windows Narrator. The adjustment will not necessarily make the "Plurality" text uttered by browsers such as Edge Read Aloud feature.

[akinorioyama]

Interim index of the occurances of ⿻ is atteched. Indexof⿻_character.txt

The file has the followig columns.

sequence	header text	description
1	section	the section of the book
2	before	text segment preceeding the ⿻ character (in pluralitybook site text)
3	after	text segment succeeding the ⿻ character (in pluralitybook site text)
4	segment_before_found	True if column 2 text is found in audiobook transcript
5	segment_after_found	True if column 3 text is found in audiobook transcript
6	before_found_string	X if column 4 text is found. - if not found.
7	after_found_string	X if column 5 text is found. - if not found.
8	all_found_before	location(s) of the column 2 text is found
9	all_latter_words_before	words found in column 8 position, which is sound in audiobook transcript
10	found_before	text segment found with a fuzzier text search
11	all_found_after	text segment found in pluralitybok sitetext with a fuzzier text search
12	all_latter_words_after	words found in front of after segment
13	found_afterfound_regex_before	N/A
14	found_regex_after	True if text segment of afterwith a fuzzier text search