Separating All Third-Party Scripts Included in base.njk into a Separate JavaScript File

### Description

Currently, we have several third-party scripts (HubSpot, PostHog, Clickbit, etc.) directly included in the base.njk file. However, when we build the website, our bundler does not bundle them like it does for JavaScript files. Each script tag results in a separate HTTP request, contributing to slower website load speeds. To improve performance, we should consolidate all third-party scripts into a separate JavaScript file, allowing our bundler to bundle them efficiently.

### Epic/Story

_No response_

### Have you provided an initial effort estimate for this issue?

I have provided an initial effort estimate