Buat fungsi parseCacheControl(header) yang menerima string Cache-Control header dan mengembalikan object.

Parse setiap directive yang dipisah koma:

• Directive tanpa value (misal "public", "no-cache") → key: true
• Directive dengan value (misal "max-age=3600") → key: number

Contoh: parseCacheControl("public, max-age=86400") → { public: true, "max-age": 86400 }

Hint

• Cache-Control header mengontrol bagaimana browser dan CDN cache.
• Parse directive: max-age, no-cache, public, private.
• "max-age=3600, public" → { maxAge: 3600, public: true }.