Fix incorrect installation instructions (for issue #37476) (#37640)

* debugging issue 36758

* debugging issue 36758

* debugging issue 36758

* updated attn_mask type specification in _flash_attention_forward

* removed pdb

* added a blank line

* removed indentation

* update constants

* remove unnecessary files

* created installation script, modified README

* modified requirements and install.sh

* undo irrelevant changes

* removed blank line

* fixing installation guide

* modified README, python requirements, and install script

* removed tests_otuput

* modified README

* discarded installation script and python<3.13 requirement

setup.py

@@ -484,6 +484,9 @@ setup(
         "Programming Language :: Python :: 3",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
+        "Programming Language :: Python :: 3.11",
+        "Programming Language :: Python :: 3.12",
+        "Programming Language :: Python :: 3.13",
         "Topic :: Scientific/Engineering :: Artificial Intelligence",
     ],
     cmdclass={"deps_table_update": DepsTableUpdateCommand},