Update dependencies and refactor p256k crypto package

- Bumped version of lol.mleku.dev from v1.0.4 to v1.0.5.
- Added new dependencies: p256k1.mleku.dev and several indirect dependencies for improved cryptographic functionality.
- Refactored p256k package to utilize p256k1.mleku.dev/signer for signature operations, replacing the previous btcec implementation.
- Removed the secp256k1.go file, consolidating the crypto logic under the new p256k1 library.
- Updated documentation to reflect changes in the signer interface and usage.

pkg/crypto/p256k/helpers.go

@@ -6,6 +6,7 @@ import (
 	"lol.mleku.dev/chk"
 	"next.orly.dev/pkg/encoders/hex"
 	"next.orly.dev/pkg/interfaces/signer"
+	p256k1signer "p256k1.mleku.dev/signer"
 )
 
 func NewSecFromHex[V []byte | string](skh V) (sign signer.I, err error) {
@@ -13,7 +14,7 @@ func NewSecFromHex[V []byte | string](skh V) (sign signer.I, err error) {
 	if _, err = hex.DecBytes(sk, []byte(skh)); chk.E(err) {
 		return
 	}
-	sign = &Signer{}
+	sign = p256k1signer.NewP256K1Signer()
 	if err = sign.InitSec(sk); chk.E(err) {
 		return
 	}
@@ -25,7 +26,7 @@ func NewPubFromHex[V []byte | string](pkh V) (sign signer.I, err error) {
 	if _, err = hex.DecBytes(pk, []byte(pkh)); chk.E(err) {
 		return
 	}
-	sign = &Signer{}
+	sign = p256k1signer.NewP256K1Signer()
 	if err = sign.InitPub(pk); chk.E(err) {
 		return
 	}