Rebase MoT fused kernels (PR #1328) onto current main and fix issues: - Rewrite _forward_sp_gen() to use MoT unified API instead of deleted *_moe_gen layers (qkv_proj_moe_gen, o_proj_moe_gen, q_norm_moe_gen, k_norm_moe_gen), which caused AttributeError when SP was active - Parameterize bias in MoT kernel tests (ZJY0516 review feedback) - Add configs/ directory with README documenting the 3-tier config loading mechanism (ZJY0516 review feedback) Signed-off-by: Zhengyuan Su <su.zhengyuan@u.nus.edu> Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> Signed-off-by: princepride <wangzhipeng628@gmail.com>