mini rails c cheatsheet in readme

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README.md
··· 8 8 9 9 completed to-do stuff 10 10 * make tags actually functional because i started adding them in prod like a fucking dumbass, got stuck, and never finished it because i was stuck and frustrated 11 + 12 + also some manual rails console tagging commands are down here for me to remember and use: 13 + 14 + ```ruby 15 + t.articles = [] 16 + 17 + t.articles << Article.find_by(id:"1") 18 + 19 + t = Tag.new(:name => 'tutorial') 20 + 21 + t.save! 22 + 23 + t = Tag.find_by(name: "tutorial") 24 + ```