chore(repo): add git-cliff config, sort deps, add rust-version

- Add cliff.toml with GitHub remote wiring, issue link parsers, and
  clean group names (no sort prefixes)
- Add rust-version = "1.87.0" and codegen-units = 1 to workspace
- Sort workspace.dependencies alphabetically; add notstrap path entry
- Add CLAUDE.md preflight block; reformat workspace table to 100-col
- Delete stale brainstorm artifacts and root HANDOFF.md

Cargo.lock

@@ -1084,7 +1084,6 @@ dependencies = [
 name = "notcore"
 version = "0.1.0"
 dependencies = [
- "anyhow",
  "dirs",
  "serde",
  "strsim",
@@ -1114,9 +1113,7 @@ dependencies = [
 name = "notforge"
 version = "0.1.0"
 dependencies = [
- "anyhow",
  "base64",
- "clap",
  "miette",
  "notcore",
  "serde",
@@ -1173,7 +1170,6 @@ dependencies = [
  "bech32",
  "chacha20poly1305",
  "curve25519-dalek",
- "dirs",
  "ed25519-dalek",
  "hkdf",
  "hmac",
@@ -1188,7 +1184,6 @@ dependencies = [
  "toml",
  "x25519-dalek",
  "yubikey",
- "zeroize",
 ]
 
 [[package]]