Expose incr_nonce in the Miden SDK (base)

[greenhat]

Tx kernel MASM implementation description for reference:

#! Increments the account nonce by the provided value.
#!
#! Inputs:  [value]
#! Outputs: []
#!
#! Where:
#! - value is the value to increment the nonce by. value can be at most 2^32 - 1 otherwise this
#!   procedure panics.
#!
#! Invocation: exec
export.incr_nonce
...

1. Add export.incr_nonce to tx kernel stubs at sdk/base-sys/masm/miden/account.masm
2. Add account:incr-nonce WIT definition at tests/rust-apps-wasm/rust-sdk/wit-sdk/miden-core-import.wit
3. Add Rust bindings at sdk/base-sys/src/bindings/account.rs
4. Add signature at frontend/wasm/src/miden_abi/tx_kernel/account.rs