I visited Peppermint Boutique on a sunny, cloudless afternoon. The store’s owner, local entrepreneur Tanvi Asher, and I sat outside at a red picnic table shaded by a leafy oak tree across from Cobb’s Hill Park. We were joined by Ginger, an enthusiastic if not slightly overeager apricot cavapoo, who is Asher’s constant companion and the shop’s unofficial mascot. Peppermint…