feat: initial implementation of grasp-mirror daemon

GRASP mirror daemon that discovers repos from watched npubs and mirrors
git data + Nostr events across all known GRASP servers for redundancy.

Features:
- Configurable npub watch list via .env (MIRROR_NPUBS)
- TOML config for GRASP server list, index relays, storage paths
- NIP-11 verification of GRASP servers on startup
- Discovery of repos via kind:30617 announcements on index relays
- Git mirroring (bare clone + push --mirror) to missing GRASP servers
- Nostr event forwarding to all GRASP server embedded relays
- SQLite state tracking for sync status and event dedup
- Optional signing key for updating announcements with new clone URLs
- CLI subcommands: daemon, status, verify, mirror-once

Architecture:
  config.rs    - TOML + .env config loading
  db.rs        - SQLite state tracking
  health.rs    - NIP-11 GRASP server verification
  discovery.rs - Relay subscription, kind:30617 parsing
  git_mirror.rs - Bare clone + push to GRASP servers
  nostr_mirror.rs - Event forwarding to all GRASP relays
  signing.rs   - Optional announcement updates
  main.rs      - CLI entry point, daemon loop

1 files changed, 24 insertions, 0 deletions

diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..a093dbb
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,24 @@
+[package]
+name = "grasp-mirror"
+version = "0.1.0"
+edition = "2021"
+description = "GRASP mirror daemon — mirrors git data and Nostr events across GRASP servers"
+license = "MIT"
+
+[dependencies]
+nostr-sdk = "0.39"
+nostr = "0.39"
+tokio = { version = "1", features = ["full"] }
+sqlx = { version = "0.8", features = ["runtime-tokio", "sqlite"] }
+toml = "0.8"
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+tracing = "0.1"
+tracing-subscriber = { version = "0.3", features = ["env-filter", "json"] }
+reqwest = { version = "0.12", features = ["json"] }
+dotenvy = "0.15"
+anyhow = "1"
+git2 = "0.20"
+hex = "0.4"
+clap = { version = "4", features = ["derive", "env"] }
+dirs = "6"