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/minimax.toml

@@ -0,0 +1,87 @@
+# MiniMax (International) — https://minimax.io
+# Models: 6
+
+[provider]
+id = "minimax"
+display_name = "MiniMax (International)"
+api_key_env = "MINIMAX_API_KEY"
+base_url = "https://api.minimax.io/v1"
+key_required = true
+
+[[models]]
+id = "minimax-text-01"
+display_name = "MiniMax Text 01"
+tier = "smart"
+context_window = 1048576
+max_output_tokens = 16384
+input_cost_per_m = 1.00
+output_cost_per_m = 3.00
+supports_tools = true
+supports_vision = false
+supports_streaming = true
+aliases = ["minimax"]
+
+[[models]]
+id = "MiniMax-M2.5"
+display_name = "MiniMax M2.5"
+tier = "frontier"
+context_window = 1048576
+max_output_tokens = 16384
+input_cost_per_m = 1.10
+output_cost_per_m = 4.40
+supports_tools = true
+supports_vision = true
+supports_streaming = true
+aliases = ["minimax-m2.5"]
+
+[[models]]
+id = "MiniMax-M2.5-highspeed"
+display_name = "MiniMax M2.5 Highspeed"
+tier = "smart"
+context_window = 1048576
+max_output_tokens = 16384
+input_cost_per_m = 0.80
+output_cost_per_m = 3.20
+supports_tools = true
+supports_vision = true
+supports_streaming = true
+aliases = ["minimax-m2.5-highspeed", "m2.5-highspeed"]
+
+[[models]]
+id = "MiniMax-M2.1"
+display_name = "MiniMax M2.1"
+tier = "smart"
+context_window = 1048576
+max_output_tokens = 16384
+input_cost_per_m = 1.00
+output_cost_per_m = 3.00
+supports_tools = true
+supports_vision = false
+supports_streaming = true
+aliases = ["minimax-m2.1"]
+
+[[models]]
+id = "abab6.5-chat"
+display_name = "ABAB 6.5 Chat"
+tier = "balanced"
+context_window = 245760
+max_output_tokens = 8192
+input_cost_per_m = 0.50
+output_cost_per_m = 1.50
+supports_tools = true
+supports_vision = false
+supports_streaming = true
+aliases = []
+
+[[models]]
+id = "abab7-chat"
+display_name = "ABAB 7 Chat"
+tier = "smart"
+context_window = 524288
+max_output_tokens = 16384
+input_cost_per_m = 0.80
+output_cost_per_m = 2.40
+supports_tools = true
+supports_vision = true
+supports_streaming = true
+aliases = ["abab7"]