* Renamed `NWCClient` to `nwc.NewNWCClient(opts)` in `cmd/nwcclient/main.go`
* Added `RPCRaw` wrappers for NWC client methods in `pkg/protocol/nwc/methods.go`
**Updated walletcli main function**
* Updated the main function in `cmd/walletcli/main.go` to use new NWC client and RPCRaw wrappers
**Added new methods for walletcli**
* Added new methods for handling NWC client RPC calls, such as:
* `handleGetWalletServiceInfo`
* `handleMakeHoldInvoice`
* `handleSettleHoldInvoice`
* `handleCancelHoldInvoice`
**Code formatting and style changes**
* Formatted code according to Go standard
* Used consistent naming conventions and coding styles
**Other updates**
* Updated dependencies and imported packages accordingly
- cmd/lerproxy/app/bufpool.go
- Removed bufferPool-related code and `Pool` struct
- cmd/nwcclient/main.go
- Renamed `Method` to `Capability` for clarity in method handling
- pkg/utils/values/values.go
- Added utility functions to return pointers for various types
- pkg/utils/pointers/pointers.go
- Revised documentation to reference `utils/values` package for pointer utilities
- pkg/protocol/nwc/types.go
- Replaced redundant types and structures with simplified versions
- Introduced dedicated structs for `MakeInvoice`, `PayInvoice`, and related results
- Refactored `Transaction` and its fields for consistent type usage
- pkg/protocol/nwc/uri.go
- Added `ParseConnectionURI` function for URI parsing and validation
- pkg/protocol/nwc/client.go
- Refactored `Client` struct to improve key management and relay handling
- Introduced `Request` struct for generic method invocation payloads
