Add glm-5 to MODEL_MAPPING #90

GLM-5 is a Kiro-supported model (launched 2026-03-31, us-east-1, 200K context, 0.5x credit multiplier — https://kiro.dev/docs/cli/models/#glm-5) but is missing from MODEL_MAPPING in plugin 1.9.0, so requests fail with Unsupported model.

Issue #78 originally listed 5 missing models. Version 1.9.0 added 4 of them (deepseek-3.2, minimax-m2.5, minimax-m2.1, qwen3-coder-next) but glm-5 was not included. Closed PR #81 attempted all 5 but was not merged.

Error message

Unsupported model: glm-5. Supported models: claude-haiku-4-5, claude-haiku-4-5-thinking, claude-sonnet-4-5, claude-sonnet-4-5-thinking, claude-sonnet-4-5-1m, claude-sonnet-4-5-1m-thinking, claude-sonnet-4-6, claude-sonnet-4-6-thinking, claude-sonnet-4-6-1m, claude-sonnet-4-6-1m-thinking, claude-opus-4-5, claude-opus-4-5-thinking, claude-opus-4-6, claude-opus-4-6-thinking, claude-opus-4-6-1m, claude-opus-4-6-1m-thinking, claude-opus-4-7, claude-opus-4-7-thinking, claude-sonnet-4, claude-3-7-sonnet, nova-swe, gpt-oss-120b, minimax-m2, kimi-k2-thinking, auto, deepseek-3.2, minimax-m2.5, minimax-m2.1, qwen3-coder-next

To reproduce

1. Configure kiro provider in opencode.json with model glm-5.
2. Run opencode run -m kiro/glm-5 "hi" (or select GLM-5 in the model picker).
3. Error above.

Environment

• OS: Linux (WSL)
• plugin: @zhafron/opencode-kiro-auth@1.9.0
• opencode version: 1.14.39