chore: reorganize examples and templates into examples/ by type (#54)

- Move example skills to examples/skills/
- Move scaffolding templates to examples/{agents,hands,channels,plugins,providers,integrations,skills}/
- Remove legacy skill.toml from example skills; SKILL.md is the canonical format
- Delete top-level templates/ directory

examples/providers/provider.toml

@@ -0,0 +1,22 @@
+# TODO: Provider Name — https://example.com
+# Models: 1
+
+[provider]
+id = "{{NAME}}"
+display_name = "TODO: Provider Display Name"
+api_key_env = "TODO_API_KEY"
+base_url = "https://api.example.com/v1"
+key_required = true
+
+[[models]]
+id = "TODO-model-id"
+display_name = "TODO: Model Display Name"
+tier = "balanced"                         # frontier | smart | balanced | fast | local
+context_window = 128000
+max_output_tokens = 4096
+input_cost_per_m = 0.0
+output_cost_per_m = 0.0
+supports_tools = true
+supports_vision = false
+supports_streaming = true
+aliases = []