doc: update & move over tutorials

[jcstein]

Move over gm world, recipe book, wordle, cosmwasm, ethermint tutorials to tutorials section

• gm world (docs: gm rollkit #1)
• test gm init.sh script, either add version for both networks, or add a note that they are different and we recommend X or Y. UPDATE: it may make most sense to guide people to use Mocha for this and the next 4 tasks
• same as above for recipes init.sh
• same as above for wordle init.sh
• same as above for cosmwasm
• same as above for ethermint
• recipe book
• wordle
• cosmwasm
• ethermint
• fuelmint