chore(maestro): drop dead maestro-names crate

Nothing in the workspace depended on it — session handles are generated
client-side in web/src/names.ts, which carried its own copy of the
wordlists. Also drops two unused deps: rust-embed (no crate used it;
maestro-web embeds via include_dir) and urlencoding in maestro-cli.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

CLAUDE.md

@@ -49,7 +49,6 @@ crates/
 ├── maestro/             # umbrella binary `maestro` (cli + daemon + tui, feature-gated) (NAP-245)
 ├── maestro-protocol/    # shared wire types (NAP-211)
 ├── maestro-config/      # shared on-disk config schema (NAP-233)
-├── maestro-names/       # orchestra-themed session-handle generator (#23)
 ├── maestro-cli/         # `maestro list/spawn/attach/kill` dispatch (NAP-216)
 ├── maestro-daemon/      # `maestro daemon` — tmux wrapper + HTTP/WS API (NAP-212, NAP-214)
 ├── maestro-web/         # standalone `maestro-web` browser UI (NAP-241, NAP-249)
@@ -61,9 +60,6 @@ web/                     # browser SPA (NAP-218)
 
 See `docs/INSTALL.md` for end-user install instructions.
 
-The dated design docs under `docs/superpowers/specs/` predate the single-host
-refactor; they carry banners marking what no longer applies.
-
 ## Conventions
 
 - **TDD by default.** Failing test first, then minimal impl. Commit test + impl together.