Add DOC16: Limit minor steps to 3

[eveiscoull]

Resolves #5

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When providing minor steps or instructions, limit them to a maximum of 3. If more steps are needed, consider breaking them into separate major steps. Having more than 3 minor steps can make instructions harder to follow.

1. Step 1.1 > step 1.2 > step 1.3 > step 1.4 > step 1.5
2. Step 2.1 > step 2.2 > step 2.3
   becomes

1. Step 1.1 > step 1.2 > step 1.3
2. Step 2.1 > step 2.2
3. Step 3.1 > step 3.2 > step 3.3