feat: initial model catalog with 196 models across 39 providers

Community-maintained TOML catalog for LibreFang. New models can be added
via PR without requiring a LibreFang binary release.

Includes validation script, bilingual docs, and GitHub templates.

providers/claude-code.toml

@@ -0,0 +1,48 @@
+# Claude Code CLI — subprocess-based provider
+# Models: 3 (requires `claude` CLI installed)
+
+[provider]
+id = "claude-code"
+display_name = "Claude Code"
+api_key_env = ""
+base_url = ""
+key_required = false
+
+[[models]]
+id = "claude-code/opus"
+display_name = "Claude Opus (CLI)"
+tier = "frontier"
+context_window = 200000
+max_output_tokens = 128000
+input_cost_per_m = 5.0
+output_cost_per_m = 25.0
+supports_tools = false
+supports_vision = false
+supports_streaming = true
+aliases = ["claude-code-opus"]
+
+[[models]]
+id = "claude-code/sonnet"
+display_name = "Claude Sonnet (CLI)"
+tier = "smart"
+context_window = 200000
+max_output_tokens = 64000
+input_cost_per_m = 3.0
+output_cost_per_m = 15.0
+supports_tools = false
+supports_vision = false
+supports_streaming = true
+aliases = ["claude-code", "claude-code-sonnet"]
+
+[[models]]
+id = "claude-code/haiku"
+display_name = "Claude Haiku (CLI)"
+tier = "fast"
+context_window = 200000
+max_output_tokens = 8192
+input_cost_per_m = 0.25
+output_cost_per_m = 1.25
+supports_tools = false
+supports_vision = false
+supports_streaming = true
+aliases = ["claude-code-haiku"]