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/kimi-coding.toml

@@ -0,0 +1,22 @@
+# Kimi for Code — https://api.kimi.com
+# Models: 1
+
+[provider]
+id = "kimi_coding"
+display_name = "Kimi for Code"
+api_key_env = "KIMI_API_KEY"
+base_url = "https://api.kimi.com/coding"
+key_required = true
+
+[[models]]
+id = "kimi-for-coding"
+display_name = "Kimi For Coding"
+tier = "frontier"
+context_window = 262144
+max_output_tokens = 32768
+input_cost_per_m = 0.0
+output_cost_per_m = 0.0
+supports_tools = true
+supports_vision = true
+supports_streaming = true
+aliases = []