Make pyproject.toml PEP 621 compliant

- converted tool.poetry to PEP 621 (default behavior for poetry)
- converted setup.py to PEP 621 (recommended by setuptools)
- use pyproject.toml instead of version.txt
- use importlib instead of version.txt
- use PEP 621 dependency format in flatpak build scripts
- added tomli as a dev dependency (used in build scripts)
- removed version.txt (no longer used)
- cleaned up dependencies

- version is still in desktop/setup.py (unclear on how snapcraft uses it)
- poetry lockfiles need to be rebuilt

desktop/setup.py

@@ -1,53 +1,11 @@
 #!/usr/bin/env python3
 # This file is used to build the Snapcraft and Flatpak packages
-import setuptools
+from setuptools import setup
 
 # The version must be hard-coded because Snapcraft won't have access to ../cli
 version = "2.6.3"
 
-setuptools.setup(
+setup(
     name="onionshare",
     version=version,
-    long_description="Securely and anonymously share files, host websites, and chat with friends using the Tor network",
-    author="Micah Lee",
-    author_email="micah@micahflee.com",
-    maintainer="Micah Lee",
-    maintainer_email="micah@micahflee.com",
-    url="https://onionshare.org",
-    license="GPLv3",
-    keywords="onion, share, onionshare, tor, anonymous, web server",
-    classifiers=[
-        "Programming Language :: Python :: 3",
-        "Framework :: Flask",
-        "Topic :: Communications :: File Sharing",
-        "Topic :: Security :: Cryptography",
-        "License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)",
-        "Intended Audience :: End Users/Desktop",
-        "Operating System :: OS Independent",
-        "Environment :: Web Environment",
-    ],
-    packages=[
-        "onionshare",
-        "onionshare.tab",
-        "onionshare.tab.mode",
-        "onionshare.tab.mode.share_mode",
-        "onionshare.tab.mode.receive_mode",
-        "onionshare.tab.mode.website_mode",
-        "onionshare.tab.mode.chat_mode",
-    ],
-    package_data={
-        "onionshare": [
-            "resources/*",
-            "resources/images/*",
-            "resources/images/countries/*",
-            "resources/locale/*",
-            "resources/countries/*",
-        ]
-    },
-    entry_points={
-        "console_scripts": [
-            "onionshare = onionshare:main",
-            "onionshare-cli = onionshare_cli:main",
-        ],
-    },
 )