Feature(MInference): add xAttention

[iofu728]

What does this PR do?

• Add xAttention, https://github.com/mit-han-lab/x-attention

Before submitting

• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• Was this discussed/approved via a Github issue? Please add a link
  to it if that's the case.
• Did you make sure to update the documentation with your changes?
• Did you write any new necessary tests?

Who can review?

@iofu728

[Copilot]

Pull Request Overview

This PR introduces support for xAttention by adding new kernel implementations and updating related configuration, module, and documentation files.

• Added xAttention kernels in the ops folder.
• Updated module routing, model patching, and configuration to include xAttention.
• Revised the README to document the new feature.

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
minference/ops/xattention_fa.py	Added kernel implementations for xAttention operations.
minference/modules/forward.py	Updated to map "xattention" to its forward function.
minference/models_patch.py	Extended model patching support to include "xattention".
minference/minference_configuration.py	Updated configuration to register "xattention" as a supported type.
README.md	Documented the xAttention feature in the supported methods list.

Comments suppressed due to low confidence (1)

minference/ops/xattention_fa.py:213

• The parameter name 'is_caual' is misspelled; consider renaming it to 'is_causal' for clarity.

def flat_group_gemm_fuse_reshape_kernel(Q, K, Out, ... is_caual: tl.constexpr,):

[Copilot]

Avoid using a bare except with a debugger breakpoint; consider handling a specific exception or removing the breakpoint in production code.

Suggested change

	except:
	except AssertionError: