Development infrastructure does not work with espradio

[soypat]

Gopls and go doc cannot pick up files that compile CGo. This is an issue for humans and more so for agents developing with espradio.

#43 is a path to fixing this but requires a bit more love.

Observed behaviour:

List of identifiers go doc . picks up

const MaxFrameSize = 1518
const Version = "0.1.0"
func NetifRxStats() (uint32, uint32)
type DHCPConfig struct{ ... }
type Error C.esp_err_t
type EthernetDevice interface{ ... }
type NetDev struct{ ... }
    func StartNetDev() (*NetDev, error)
    func StartNetDevAP() (*NetDev, error)
type Stack struct{ ... }
    func NewStack(dev *NetDev, cfg StackConfig) (*Stack, error)
type StackConfig struct{ ... }

Gopls: