Add API tokens, CLI server API and shared core crate

- Personal API tokens (full/read scope, expiry, revoke) and CLI password login
- Cargo workspace: codecraft-core (types, providers, permission rules) shared by
  server and the upcoming terminal client; server re-exports the old paths
- CLI server API: /cli/config, /cli/skill, /cli/tool (server MCP tools),
  /llm/stream model gateway with budgets and usage per user
- Theme/language preferences mirrored to the server; personal memory endpoint
- Statistics: provider and mode tables stacked; CLI usage labelled
- cli/: work in progress (terminal client is being rewritten as a local TUI)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

cli/Cargo.toml

@@ -0,0 +1,20 @@
+[package]
+name = "codecraft-cli"
+version = "0.1.0"
+edition = "2024"
+description = "Command line client for CodeCraft"
+license = "MIT"
+
+[[bin]]
+name = "codecraft"
+path = "src/main.rs"
+
+[dependencies]
+anyhow = "1"
+clap = { version = "4", features = ["derive", "env"] }
+futures-util = "0.3"
+reqwest = { version = "0.13", default-features = false, features = ["json", "rustls"] }
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+tokio = { version = "1", features = ["macros", "rt-multi-thread", "io-std", "io-util", "fs", "time", "signal"] }
+tokio-tungstenite = { version = "0.28", default-features = false, features = ["connect", "rustls-tls-webpki-roots"] }