rewrite planoai CLI in Rust

Add crates/plano-cli/ as a full Rust rewrite of the Python CLI.
Binary name: planoai. All subcommands ported: up, down, build,
logs, cli-agent, trace, init. Config validation and Tera template
rendering replace the Python config_generator. CI updated to use
cargo test/build instead of Python test jobs.

crates/plano-cli/templates/coding_agent_routing.yaml

@@ -0,0 +1,41 @@
+version: v0.3.0
+
+model_providers:
+  # OpenAI Models
+  - model: openai/gpt-5-2025-08-07
+    access_key: $OPENAI_API_KEY
+    routing_preferences:
+      - name: code generation
+        description: generating new code snippets, functions, or boilerplate based on user prompts or requirements
+
+  - model: openai/gpt-4.1-2025-04-14
+    access_key: $OPENAI_API_KEY
+    routing_preferences:
+      - name: code understanding
+        description: understand and explain existing code snippets, functions, or libraries
+  # Anthropic Models
+  - model: anthropic/claude-sonnet-4-5
+    default: true
+    access_key: $ANTHROPIC_API_KEY
+
+  - model: anthropic/claude-haiku-4-5
+    access_key: $ANTHROPIC_API_KEY
+
+  # Ollama Models
+  - model: ollama/llama3.1
+    base_url: http://localhost:11434
+
+
+# Model aliases - friendly names that map to actual provider names
+model_aliases:
+  # Alias for a small faster Claude model
+  arch.claude.code.small.fast:
+    target: claude-haiku-4-5
+
+listeners:
+  - type: model
+    name: model_listener
+    port: 12000
+
+tracing:
+  random_sampling: 100