[pull] main from microsoft:main #197
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Adds `$profile:experimental.rainbowSuggestions`, which makes the suggestion text all RGB. This sparks joy.
First, this adds `GraphemeTableGen` which * parses `ucd.nounihan.grouped.xml` * computes the cluster break property for each codepoint * computes the East Asian Width property for each codepoint * compresses everything into a 4-stage trie * computes a LUT of cluster break rules between 2 codepoints * and serializes everything to C++ tables and helper functions Next, this adds `GraphemeTestTableGen` which * parses `GraphemeBreakTest.txt` * splits each test into graphemes and break opportunities * and serializes everything to a C++ table for use as unit tests `CodepointWidthDetector.cpp` was rewritten from scratch to * use an iterator struct (`GraphemeState`) to maintain state * accumulate codepoints until a break opportunity arises * accumulate the total width of a grapheme * support 3 different measurement modes: Grapheme clusters, `wcswidth`-style, and a mode identical to the old conhost With this in place the following changes were made: * `ROW::WriteHelper::_replaceTextUnicode` now uses the new grapheme cluster text iterators * The same function was modified to join new text with existing contents of the current cell if they join to form a cluster * Otherwise, a ton of places were modified to funnel the selection of the measurement mode over from WT's settings to ConPTY This is part of #1472 ## Validation Steps Performed * So many tests ✅ * https://github.com/apparebit/demicode works fantastic ✅ * UTF8-torture-test.txt works fantastic ✅
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