Reorganize rust crates into a flat crates directory, simplify some CI steps (#4496)

* Move all rust crates (except lib) into crates dir, w/o nesting

* Remove stale path from .gitattributes

* Rename lib.rs files for easier navigation

* Rename mod.rs file for easier navigation

* Fix emscripten-version path

* Fix fixtures dir paths

* Use the default rustfmt settings

* Don't use nightly on CI

cli/src/templates/setup.py

@@ -1,77 +0,0 @@
-from os import path
-from platform import system
-from sysconfig import get_config_var
-
-from setuptools import Extension, find_packages, setup
-from setuptools.command.build import build
-from setuptools.command.egg_info import egg_info
-from wheel.bdist_wheel import bdist_wheel
-
-sources = [
-    "bindings/python/tree_sitter_LOWER_PARSER_NAME/binding.c",
-    "src/parser.c",
-]
-if path.exists("src/scanner.c"):
-    sources.append("src/scanner.c")
-
-macros: list[tuple[str, str | None]] = [
-    ("PY_SSIZE_T_CLEAN", None),
-    ("TREE_SITTER_HIDE_SYMBOLS", None),
-]
-if limited_api := not get_config_var("Py_GIL_DISABLED"):
-    macros.append(("Py_LIMITED_API", "0x030A0000"))
-
-if system() != "Windows":
-    cflags = ["-std=c11", "-fvisibility=hidden"]
-else:
-    cflags = ["/std:c11", "/utf-8"]
-
-
-class Build(build):
-    def run(self):
-        if path.isdir("queries"):
-            dest = path.join(self.build_lib, "tree_sitter_PARSER_NAME", "queries")
-            self.copy_tree("queries", dest)
-        super().run()
-
-
-class BdistWheel(bdist_wheel):
-    def get_tag(self):
-        python, abi, platform = super().get_tag()
-        if python.startswith("cp"):
-            python, abi = "cp310", "abi3"
-        return python, abi, platform
-
-
-class EggInfo(egg_info):
-    def find_sources(self):
-        super().find_sources()
-        self.filelist.recursive_include("queries", "*.scm")
-        self.filelist.include("src/tree_sitter/*.h")
-
-
-setup(
-    packages=find_packages("bindings/python"),
-    package_dir={"": "bindings/python"},
-    package_data={
-        "tree_sitter_LOWER_PARSER_NAME": ["*.pyi", "py.typed"],
-        "tree_sitter_LOWER_PARSER_NAME.queries": ["*.scm"],
-    },
-    ext_package="tree_sitter_LOWER_PARSER_NAME",
-    ext_modules=[
-        Extension(
-            name="_binding",
-            sources=sources,
-            extra_compile_args=cflags,
-            define_macros=macros,
-            include_dirs=["src"],
-            py_limited_api=limited_api,
-        )
-    ],
-    cmdclass={
-        "build": Build,
-        "bdist_wheel": BdistWheel,
-        "egg_info": EggInfo,
-    },
-    zip_safe=False
-)