remove nestjs admin stuff since we don't use it

[AdamFipke]

Description

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update
• This requires a run of yarn install
• This change requires an addition/change to the production .env variables. These changes are below:
• This change requires developers to add new .env variables. The file and variables needed are below:
• This change requires a database query to update old data on production. This query is below:

How Has This Been Tested?

vibes

Checklist:

• I have performed a self-review of my own code
• I have commented my code where needed
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any work that this PR is dependent on has been merged into the main branch
• Any UI changes have been checked to work on desktop, tablet, and mobile

[Copilot]

Copilot reviewed 10 out of 13 changed files in this pull request and generated 1 comment.

Files not reviewed (3)

• infrastructure/dev/httpd.conf: Language not supported
• packages/frontend/app/robots.txt: Language not supported
• packages/server/package.json: Language not supported

[d3li0n]

Minor comment

[d3li0n]

NestJS command should probably be deleted as well