Uc-sgsim

What's Changed
* ci(codeql): use python3.11 to aviod no distutils error by Zncl2222 in https://github.com/Zncl2222/uc_sgsim/pull/223
* Start of v1.2.9 by Zncl2222 in https://github.com/Zncl2222/uc_sgsim/pull/222
* C/feature/sgsim constant path by Zncl2222 in https://github.com/Zncl2222/uc_sgsim/pull/224
* docs(sgsim): fix wrong spelling and style of comment and remove redundant code by Zncl2222 in https://github.com/Zncl2222/uc_sgsim/pull/225
* feat(repr): add repr of kriging, sgsimfiled and covmodel for better readability by Zncl2222 in https://github.com/Zncl2222/uc_sgsim/pull/226
* Add test cases and docs for cov_cache in c code by Zncl2222 in https://github.com/Zncl2222/uc_sgsim/pull/227
* Releasev1.2.9 by Zncl2222 in https://github.com/Zncl2222/uc_sgsim/pull/229


**Full Changelog**: https://github.com/Zncl2222/uc_sgsim/compare/v1.2.8...v1.2.9

**Full Changelog**: https://github.com/Zncl2222/uc_sgsim/compare/v1.2.5...v1.2.6

* fix(setup): fix the path of plotting pakckages by Zncl2222 in https://github.com/Zncl2222/uc_sgsim/pull/193


**Full Changelog**: https://github.com/Zncl2222/uc_sgsim/compare/v1.2.4...v1.2.5

**Full Changelog**: https://github.com/Zncl2222/uc_sgsim/compare/v1.2.3...v1.2.4