Rewriting graphing, removing PostgreSQL.

[Xithrius]

Changes:

• Flake8 now includes the I100 rule, ruling over imports.
• Caching when the linting workflow is running.
• Updated dependencies.
• Removed Python's standard library logging module, and replaced it with a 3rd party loguru module.
• Requesting/posting moved to subclass of discord.ext.commands.Bot within bot.py.
• Simplified the reloading cog command.
• Console will now contain the full traceback of any unexpected error, and the error embed triggered by the user will contain the very last traced file.
• Cog for graphing is now called Plotting, and utility for graphing is called graphs.py.
• Reddit cog now graphs upvotes or other numbers over time.
• A metric ton of formatting.
• formatting.py created to provide string formatting.
• Graph class turned into a singular graph_2d synchronous function that can be awaited because of a useful decorator called plot_and_save.

Additions:

• CatJam workflow.
• Subclassed discord.ext.commands.Context for embedding and void returns from await ctx.send().
• On unknown error, the Warnings cog will give a DuckDuckGo search query, for faster research.
• game_data extension, which contains the Warframe and Factorio cogs.
• Random cog has been added for bar graphs of dice rolls.

Deletions:

• Obliterated PostgreSQL, there is nothing remaining. Changed README.md to account for that, along with docker configs and environment variables.
• No longer using black for formatting.
• Removed AntiCommandSpam, that will come in a later update when Redis caching is implemented.
• Vectorization, Dates, Snippets, and Notes were removed because they either relied on databases or just didn't have any use.
• unit_conversion.py completed obliterated.
• shortcuts.py split up and moved into too many different places to count.

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