Release 0.2.8: dir-aware global binaries, interactive plugin menu, closed-env activation

[DracoRunner]

Summary

Fixes two real usability bugs and adds discoverability, plus a small dead-code cleanup.

Issue 1 — global packages (npm i -g <pkg>) were unrunnable

• reshim generates shims for every executable in installed versions' bin/ dirs; auto-runs after npm/yarn/pnpm/bun install commands, so tsc, eslint, etc. work immediately (no manual reshim step).
• exec-shim now resolves any binary across managed versions — local pin → global pin → other tools — so a globally-installed tool runs regardless of the active project version.

Issue 2 — closed envs (Codex/Claude) reset PATH and lose dir-aware resolution

• avm shims activate idempotently adds ~/.avm/shims to .zshenv/.bashrc/.profile. .zshenv is sourced by every zsh invocation (incl. non-interactive zsh -c), which is how such sandboxes spawn shells.

UX

• Bare avm <plugin> (e.g. avm java) now opens an interactive action menu that chains into the chosen action; uniform for every plugin. Non-TTY falls back to the classic status printout.
• Clearer unknown-subcommand hint.

Cleanup

• Removed 65 lines of dead duplicated resolver methods on Resolver.

New commands

• avm shims reshim
• avm shims activate
• avm shims install now reshims too

Testing

• Full workspace builds with no warnings; all 25 CLI scenario tests pass.
• Verified live: fake global bin → reshim → runnable; cross-version fallback; activate idempotency (throwaway HOME).

Notes / follow-ups

• Cross-version fallback runs a global tool under the global version's runtime, not the project-pinned one — matches the "installed globally = runnable everywhere" ask. Can add a warn/refuse if strictness is preferred.
• No shim pruning on uninstall (stale shim falls through to system PATH).
• Non-interactive bash -c isn't covered by activate (bash has no .zshenv equivalent without $BASH_ENV).