feat: add PPCG eigenvalue solver implementation#7414

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OIerwsq wants to merge 5 commits into

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OIerwsq:feature/ppcg-solver

Commits on May 30, 2026

feat: add PPCG eigenvalue solver implementation
dyzheng
committed

Commits on Jun 5, 2026

fix: resolve CI compilation errors and address review comments
dyzheng
committed
fix: add diago_ppcg.cpp to MODULE_HSOLVER_pw and MODULE_HSOLVER_sdft test targets
dyzheng
committed
Merge remote-tracking branch 'origin/develop' into feature/ppcg-solver
dyzheng
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fix: address Copilot review comments and update documentation
dyzheng
committed