fix(common): update request headers/params setter method types to accept partial objects

The runtime schema uses .catch() fallbacks for all fields (`key`, `value`, `active`, `description`), making them effectively optional at runtime. Updated type definitions to use Partial<> to match actual runtime behavior and prevent type errors in usage.

This allows valid usage patterns like:

``
hopp.request.setHeaders([{ key: "X-Custom", value: "foo" }])
```

Without requiring all fields (`active`, `description`) to be explicitly provided.

packages/hoppscotch-common/src/types/pre-request.d.ts

@@ -275,10 +275,10 @@ declare namespace hopp {
     setUrl(url: string): void
     setMethod(method: string): void
     setHeader(name: string, value: string): void
-    setHeaders(headers: HoppRESTHeader[]): void
+    setHeaders(headers: Array<Partial<HoppRESTHeader>>): void
     removeHeader(key: string): void
     setParam(name: string, value: string): void
-    setParams(params: HoppRESTParam[]): void
+    setParams(params: Array<Partial<HoppRESTParam>>): void
     removeParam(key: string): void
     /**
      * Set or update request body with automatic merging