Insurance — Homeowners — Summary judgment — Supporting affidavits — Trial court erred in entering summary judgment in favor of insurer on insurer’s breach of contract and fraud claims — Affidavit of corporate representative filed in support of insurer’s motions was insufficient basis for summary judgment where affidavit lacked sufficient information establishing that affiant possessed personal knowledge and competency to testify to the matters set forth in the affidavit, which included statements ranging from contract interpretation to trade specialties of plumbing and contracting