give the ability to the user to select a custom api instead of only relying on gemini pro api

[mlnomadpy]

just change this function in popup.js, and make sure to wrap it in another function that help you choose the correct API to use (langchain, firebase, huggingface...)

async function getSummaryFromGeminiPro(content, apiKey, prefix) {
    const genAI = new GoogleGenerativeAI(apiKey);
    const model = genAI.getGenerativeModel({ model: "gemini-pro" });
    
    const fullContent = prefix + content;
    
    try {
        const result = await model.generateContent(fullContent);
        const response = await result.response;
        return await response.text();
    } catch (error) {
        console.error('Error generating processing:', error);
        throw new Error('Processing failed');
    }
}