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/ollama.toml

@@ -0,0 +1,87 @@
+# Ollama — https://ollama.com
+# Models: 6 (static entries; additional models discovered dynamically at runtime)
+
+[provider]
+id = "ollama"
+display_name = "Ollama"
+api_key_env = "OLLAMA_API_KEY"
+base_url = "http://localhost:11434/v1"
+key_required = false
+
+[[models]]
+id = "llama3.2"
+display_name = "Llama 3.2 (Ollama)"
+tier = "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 = []
+
+[[models]]
+id = "llama3.1"
+display_name = "Llama 3.1 (Ollama)"
+tier = "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 = []
+
+[[models]]
+id = "mistral:latest"
+display_name = "Mistral (Ollama)"
+tier = "local"
+context_window = 32768
+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 = []
+
+[[models]]
+id = "qwen2.5"
+display_name = "Qwen 2.5 (Ollama)"
+tier = "local"
+context_window = 32768
+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 = []
+
+[[models]]
+id = "phi3"
+display_name = "Phi-3 (Ollama)"
+tier = "local"
+context_window = 128000
+max_output_tokens = 4096
+input_cost_per_m = 0.0
+output_cost_per_m = 0.0
+supports_tools = false
+supports_vision = false
+supports_streaming = true
+aliases = []
+
+[[models]]
+id = "deepseek-r1:latest"
+display_name = "DeepSeek R1 (Ollama)"
+tier = "local"
+context_window = 64000
+max_output_tokens = 4096
+input_cost_per_m = 0.0
+output_cost_per_m = 0.0
+supports_tools = false
+supports_vision = false
+supports_streaming = true
+aliases = []