Refactor NIP-XX Document and Protocol Implementation for Directory Consensus

- Updated the NIP-XX document to clarify terminology, replacing "attestations" with "acts" for consistency.
- Enhanced the protocol by introducing new event kinds: Trust Act (Kind 39101) and Group Tag Act (Kind 39102), with detailed specifications for their structure and usage.
- Modified the signature generation process to include the canonical WebSocket URL, ensuring proper binding and verification.
- Improved validation mechanisms for identity tags and event replication requests, reinforcing security and integrity within the directory consensus protocol.
- Added comprehensive documentation for new event types and their respective validation processes, ensuring clarity for developers and users.
- Introduced new helper functions and structures to facilitate the creation and management of directory events and acts.

go.mod

@@ -27,7 +27,6 @@ require (
 require (
 	github.com/BurntSushi/toml v1.5.0 // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
-	github.com/chzyer/readline v1.5.1 // indirect
 	github.com/dgraph-io/ristretto/v2 v2.3.0 // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
 	github.com/felixge/fgprof v0.9.5 // indirect
@@ -35,7 +34,6 @@ require (
 	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/google/flatbuffers v25.9.23+incompatible // indirect
 	github.com/google/pprof v0.0.0-20251007162407-5df77e3f7d1d // indirect
-	github.com/ianlancetaylor/demangle v0.0.0-20250417193237-f615e6bd150b // indirect
 	github.com/klauspost/compress v1.18.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/templexxx/cpu v0.1.1 // indirect