feat(notcore): add shared types, config, paths, error crate

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Cargo.toml

@@ -1,19 +1,27 @@
-[package]
-name = "notfiles"
-version = "0.1.0"
-edition = "2024"
-description = "A modern dotfiles manager — a pure Rust alternative to GNU Stow"
+[workspace]
+members = [
+    "crates/notcore",
+    "crates/notfiles",
+    "crates/notsecrets",
+    "crates/nothooks",
+    "crates/notstrap",
+]
+resolver = "2"
 
-[dependencies]
-clap = { version = "4", features = ["derive"] }
-serde = { version = "1", features = ["derive"] }
-toml = "0.8"
-thiserror = "2"
-anyhow = "1"
-globset = "0.4"
-dirs = "6"
-chrono = { version = "0.4", default-features = false, features = ["clock"] }
-
-[dev-dependencies]
-tempfile = "3"
-assert_fs = "1"
+[workspace.dependencies]
+anyhow      = "1"
+clap        = { version = "4", features = ["derive"] }
+chrono      = { version = "0.4", default-features = false, features = ["clock"] }
+dirs        = "6"
+globset     = "0.4"
+serde       = { version = "1", features = ["derive"] }
+thiserror   = "2"
+toml        = "0.8"
+which       = "7"
+rpassword   = "7"
+tempfile    = "3"
+assert_fs   = "1"
+notcore     = { path = "crates/notcore" }
+notfiles    = { path = "crates/notfiles" }
+notsecrets  = { path = "crates/notsecrets" }
+nothooks    = { path = "crates/nothooks" }