The ansi target, txt table styles, kdesc reference from ref/, typeface and table-width fixes (from dev fcec5e2e77ac)

Since the previous release: Machine::read_string() (the fs::path/std::string
overload pair split); kdesc -c and -u rendered from the ref/ reflection
klammerset; a fit column's tex width measured in TeX over every entry;
@typeface resolving to the family its css declares (a store directory name
now works in html) and hieroglyphs in @unicode_examples set in their
typeface; the ansi target -- plain text with the type styles a terminal can
show, identical to txt once the escape sequences are stripped -- with the
txt @table carrying :header_style, :style and :hline; @block anchoring,
@table spacing and the Image_quality state variable; and the rewritten
doc/klammertext_for_llm.md.

mac/character.h

@@ -59,7 +59,7 @@ inline
 std::map<std::string, std::pair<std::string, std::string>> diacritics {
     {"`", {"0300", "grave accent"}},
     {"'", {"0301", "acute accent"}},
-    {"h", {"0302", "circumflex"}},
+    {"h", {"0302", "circumflex (hat)"}},
     {"~", {"0303", "tilde"}},
     {"-", {"0304", "macron"}},
     {"\"", {"0308", "diaresis"}},
@@ -138,6 +138,8 @@ const std::string italic_on() { return is_tty() ? "\033[3m" : ""; }
 inline
 const std::string italic_off() { return is_tty() ? "\033[0m" : ""; }
 
+std::string process_unicode_codepoint(std::string s, const Locator& loc = Locator::none());
+
 std::string encode(const std::string& s, const Locator& loc);
 
 // UTF-8 encoding of one code point (to U+10FFFF; surrogates and values
@@ -154,11 +156,3 @@ std::string utf8char(int cp);
 // "Invalid Unicode" text is no longer reachable from input).
 bool valid_codepoint(int cp);
 std::string invalid_codepoint_reason(int cp);
-
-// void diacritics_examples(const std::string& kt_filename = "");
-// void extended_latin_examples(const std::string& kt_filename = "");
-
-void pinyin_examples(const std::string& kt_filename = "");
-void unicode_examples(const std::string& kt_filename = "");
-
-void show_special_characters();