feat: add Token Plan quota query for Kimi, Zhipu GLM, and MiniMax

Add a new "Token Plan" template type in the usage query panel that
natively queries quota/usage from Chinese coding plan providers
(Kimi For Coding, Zhipu GLM, MiniMax) without requiring custom scripts.

- Rust backend: new coding_plan service with provider-specific API
  queries (Kimi /v1/usages, Zhipu /api/monitor/usage/quota/limit,
  MiniMax /coding_plan/remains) normalized into UsageResult
- Frontend: Token Plan template in UsageScriptModal with auto-detection
  of provider based on ANTHROPIC_BASE_URL pattern matching
- Follows the same pattern as GitHub Copilot template (dedicated API
  path in queryProviderUsage, no JS script needed)

src-tauri/src/provider.rs

@@ -106,6 +106,10 @@ pub struct UsageScript {
     #[serde(skip_serializing_if = "Option::is_none")]
     #[serde(rename = "autoQueryInterval")]
     pub auto_query_interval: Option<u64>,
+    /// Coding Plan 供应商标识（如 "kimi", "zhipu", "minimax"）
+    #[serde(skip_serializing_if = "Option::is_none")]
+    #[serde(rename = "codingPlanProvider")]
+    pub coding_plan_provider: Option<String>,
 }
 
 /// 用量数据