Add more GPU architctures support (#76)

* Add more GPU architctures support

* Merge fmha and mla runner

* add varlen & non varlen support, and add incontiguous tensor support

* update readme

* add varlen api

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Co-authored-by: dianzhangc <dianzhangc@nvidia.com>

csrc/sm100/pybind.cu

+#include <torch/python.h>
+
+void FMHACutlassSM100FwdRun(at::Tensor workspace_buffer, at::Tensor q, at::Tensor k, at::Tensor v,
+                            at::Tensor cumulative_seqlen_q, at::Tensor cumulative_seqlen_kv,
+                            at::Tensor o, at::Tensor lse,
+                            int mask_mode_code, float softmax_scale, int max_seqlen_q, int max_seqlen_kv, bool is_varlen);
+
+void FMHACutlassSM100BwdRun(at::Tensor workspace_buffer, at::Tensor d_o, at::Tensor q, at::Tensor k,
+                            at::Tensor v, at::Tensor o, at::Tensor lse,
+                            at::Tensor cumulative_seqlen_q, at::Tensor cumulative_seqlen_kv,
+                            at::Tensor dq, at::Tensor dk, at::Tensor dv,
+                            int mask_mode_code, float softmax_scale, int max_seqlen_q, int max_seqlen_kv, bool is_varlen);
+
+PYBIND11_MODULE(TORCH_EXTENSION_NAME, m) {
+    m.def("fwd", &FMHACutlassSM100FwdRun);
+    m.def("bwd", &FMHACutlassSM100BwdRun);
+}