Combine the chickpeas, garlic, oats, nutritional yeast, flaxseeds, and chia seeds in a food processor and pulse until finely chopped. Add the lemon juice, miso paste, basil, oregano, onion powder, and black pepper. Pulse until thoroughly mixed. Transfer to a large bowl and add the shredded zucchini. Stir together until well combined. The mixture should hold together when pinched between two fingers. If the mixture is too wet, add a little nutritional yeast or ground flaxseeds to absorb excess moisture.