[ #1286] Chat command suggestions + Fixing /help + code refactor

• By opening this merge request, you agree to release your code and all other changes under the GPL 3 license and to abide by the terms set by this license.
• Migrations have been added if applicable
• Significant changes of this merge request have been added to the changelog.

Done

• Printing 1 closest edit distance suggestion + all other commands with same prefix
• Only print the ones we have access to (don't show admin commands)
• Don't print both /t and /tell - only include long form
• Added mute/unmute to be printed in both /help and as possible chat command suggestions

Screenshots!