fix(cleanup): Repo tightening (#425)

## Describe your changes

## Issue ticket number and link

## Checklist before requesting a review (skip if just adding/editing
APIs & templates)

-   [ ] I added tests, otherwise the reason is:
-   [ ] External API requests have `retries`
-   [ ] Pagination is used where appropriate
- [ ] The built in `nango.paginate` call is used instead of a `while
(true)` loop
- [ ] Third party requests are NOT parallelized (this can cause issues
with rate limits)
- [ ] If a sync requires metadata the `nango.yaml` has `auto_start:
false`
-   [ ] If the sync is a `full` sync then `track_deletes: true` is set
- [ ] I followed the best practices and guidelines from the [Writing
Integration
Scripts](/NangoHQ/integration-templates/blob/main/guides/WRITING_SCRIPTS.md)
doc


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Chores**
  * Removed HubSpot action: "Get a company by its domain name"
  * Removed deprecated internal developer tools and configurations
  * Updated to version 0.69.18
* Removed outdated AI-assisted code review tooling and development
guideline files

<sub>✏️ Tip: You can customize this high-level summary in your review
settings.</sub>

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Author: khaliqgant