Add files for more standardized build tools

- Prior investigation into linux packaging (not using pyinstaller) suggested
having setuptools files could make packaging easier and automatable
- Add setup.cfg and setup.py as initial starting point
- Add MANIFEST.in (at least temporarily)

Currently with the python build module this almost works for main application.
It does not include all the extra data files right now.

.gitignore

@@ -1,5 +1,6 @@
 .DS_Store
 __pycache__
+*.egg-info
 *.so
 *.mo
 *.waf*

MANIFEST.in

@@ -0,0 +1,3 @@
+recursive-include core *.h
+recursive-include core *.m
+include run.py

setup.cfg

@@ -0,0 +1,43 @@
+[metadata]
+name = dupeGuru
+version = attr: core.__version__
+url = https://github.com/arsenetar/dupeguru
+project_urls = 
+    Bug Reports = https://github.com/arsenetar/dupeguru/issues
+author = Andrew Senetar
+author_email = arsenetar@voltaicideas.net
+license = GPLv3
+license_files = license
+description = dupeGuru is a tool to find duplicate files on your computer.
+long_description = file:README.md
+long_description_content_type = text/markdown
+classifiers =
+    Development Status :: 5 - Production/Stable
+    Intended Audience :: End Users/Desktop
+    License :: OSI Approved :: GNU General Public License v3 (GPLv3)
+    Operating System :: MacOS :: MacOS X
+    Operating System :: Microsoft :: Windows
+    Operating System :: POSIX
+    Programming Language :: Python :: 3.6
+    Programming Language :: Python :: 3.7
+    Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
+    Programming Language :: Python :: 3 :: Only
+    Topic :: Desktop Environment :: File Managers
+
+[options]
+packages = find:
+python_requires = >=3.6
+install_requires = 
+    Send2Trash>=1.3.0
+    polib>=1.1.0
+    hsaudiotag3k>=1.1.3*
+    distro>=1.5.0
+    PyQt5 >=5.14.1,<6.0; sys_platform != 'linux'
+    pywin32>=228; sys_platform == 'win32'
+tests_require = 
+    pytest >=6,<7
+
+[options.entry_points]
+console_scripts =
+    dupeguru = run.py

setup.py

@@ -0,0 +1,29 @@
+from setuptools import setup, Extension
+from pathlib import Path
+
+exts = [
+    Extension(
+        "_block",
+        [
+            str(Path("core", "pe", "modules", "block.c")),
+            str(Path("core", "pe", "modules", "common.c")),
+        ],
+        include_dirs=[str(Path("core", "pe", "modules"))],
+    ),
+    Extension(
+        "_cache",
+        [
+            str(Path("core", "pe", "modules", "cache.c")),
+            str(Path("core", "pe", "modules", "common.c")),
+        ],
+        include_dirs=[str(Path("core", "pe", "modules"))],
+    ),
+    Extension("_block_qt", [str(Path("qt", "pe", "modules", "block.c"))]),
+]
+
+headers = [str(Path("core", "pe", "modules", "common.h"))]
+
+setup(
+    ext_modules=exts,
+    headers=headers,
+)