* Normalize multi-byte char terms

* Fix rm_strdupcase_utf8

* Remove debug log

* Add Russian alphabet and diacritic tests

* Don't use DefaultNormalize_utf8() for chinese

* print available locales

* Check locale before using utf8 normalization

* Fix DefaultNormalize()

* Skip multibyte tests if 'en_US.UTF-8' locale is not available

* Test multibyte stopwords

* Revert changes in install_script.sh

* run sanitizer using ubuntu:latest

* Test_cn: fix language_field

* Remove unused strtolower function from misc.c and misc.h

* Fixes from code review

* Enhance multibyte character tests

* Validate queries using multi-byte stopwords

* Add MULTIBYTE_CHARS config param and install locales

* Use setlocale instead of querylocale for better compatibility

* revert changes in event-pull_request.yml and install French locale for debian/ubuntu

* Convert to lowercase using nunicode library

* nunicode_tolower() returns zero terminated string

* Refactor nunicode_tolower() to improve readability

* Refactor nunicode_tolower() to use destination buffer and improve memory management

* Remove null termination in nunicode_tolower()

* Improve documentation

* Support multi-byte chars for tags

* Support multi-byte chars for synonyms

* unicode_tolower(): avoid duplicating encoded input

* Increase SSO_MAX_LENGTH

* Update test to  use FT.DEBUG DUMP_TAGIDX instead of FT.TAGVALS

* Keep previous test_cn:testSynonym and test_cn:testMixedHighlight

* Update CMake configuration for consistent multi-byte char sorting

* Test JSON index

* Fix JSON test and remove unneeded tolower()

* Fix query_EvalSingleTagNode()

* Refactor string normalization to use case folding instead of lowercase conversion

* Refactor tests to use run_command_on_all_shards for setting DEFAULT_DIALECT

* BWC: Add function to convert string to single codepoint folded runes

* Rename rm_strdupcase() to rm_normalize()

* Add stemming test

* Refactor string normalization to use lowercase transformation instead of folding.
Modify FT.SUGGET flow to be BWC

* Refactor filtering functions to use a transformation callback for rune processing. Remove dead code.

* Update testDFAFilter to use strToSingleCodepointFoldedRunes for rune processing

* Refactor string normalization to use case folding (single codepoint) instead of lowercase transformation

* Revert "Refactor string normalization to use case folding (single codepoint) instead of lowercase transformation"

This reverts commit ebcf994.

* Add case sensitivity option to tag string processing functions

* Rename tag_strtofold to tag_strtolower for clarity and update related references to reflect lowercase transformation

* Simplify length checks in tag_strtolower and rm_normalize functions

* Add documentation after review

(cherry picked from commit 43701d8)