Add shell alias for plugin tool hooks

[hawkff]

Fixes #16

What

• Add a compatibility alias in plugin tool hooks so shell maps to the same handler/schema as bash.
• Keep existing bash behavior unchanged.
• Add unit coverage verifying shell is registered in plugin hooks.

Why

Some tool/subagent flows emit shell instead of bash.
Without this alias, those calls fail with:

• Model tried to call unavailable tool 'shell'

This change makes tool-call interception more robust across agent variants.

Validation

• bun test tests/unit/plugin-tools-hook.test.ts
• bun run test:ci:unit
• bun run test:ci:integration

[Nomadcxx]

Hey mate. You are a legend I did see the shell alias gap recently but plan was to move tool handling to the newer provider-boundary architecture (v1) with OpenCode-owned loop as the default, including centralized interception/normalization/guarding in the runtime path. Because of that shift, this branch is now stale/conflicting with current main and would roll back newer changes.

I’ve addressed the remaining intent directly on main by adding the local plugin tool-hook alias shell -> bash (with tests), rather than merging this older branch (check: local hook alias in src/plugin.ts:1386)

Closing as superseded by the current tool-loop/provider-boundary direction.