Can a breach of contract clause be included inside a commercial contract?

Yes, it is quite common to include one or more breach clauses in commercial contracts. They can include, among other things, specific obligations of notification of a perceived breach, prescribed periods to cure the breach, penalties for specifically defined "material" breach, liquidated damages for breach, etc.

On the other hand, there are also "non-breach" clauses that are often included as well, defining actions that would otherwise become a breach, for example: force majeure (acts of god), waiver, disclaimer of warranties, and other terms that attempt to preserve or renew the relationship.