updated all mentions and constants for DMS-UI to stage

[MitchellShiell]

Explanatory Title

Before Merging:

• [x] Update DMS-UI Repository name to Stage (Justin) (This will resolve the 404 for the GitHub outlinks)
• [x] Update the GitHub outlines/constants (Mitchell)

Other fun tasks:

• [x] Update DMS-UI readme. Below are links to other related Readme PRs requiring review:

• https://github.com/overture-stack/score/pull/398

• https://github.com/overture-stack/arranger/pull/870

• https://github.com/overture-stack/ego/pull/731

• [x] Publish updated DMS-UI package with Stage naming (Justin) (Can wait as we may update this package for OV Quickstart work)

• [x] Add disclaimer to archived DMS-UI repo

• [x] Update all GitHub Readme Tables

• Maestro and Song do not have updated readmes (Ancient PRs yet to be reviewed, I will update these with the dev docs updates, these readmes contain information that should be stored within those docs)

That should cover our bases if I am missing anything, just ping me on slack, and I'll update here

[justincorrigible]

Notes on the infrastructural changes needed beyond/around what's mentioned in the description:

• [x] Rename dms-ui repo, in order to preserve tickets, PRs, branches, etc.
• [x] Create a new dms-ui repo (instead of relying on Github's redirection) so that people can see a README note about the app being renamed, its new location, and visually identify dms-ui as "archived" etc. i.e. handle optics
• [ ] Review the corresponding helm chart, seeking to use the "stateless" chart instead.
• [ ] Update Jenkins pipelines CasC library to leverage the new configs.
• [ ] Apply this PR and redeploy the updated documentation site.
• [ ] Apply https://github.com/overture-stack/stage/pull/195 to update within Stage's repo as well

[MitchellShiell]

Nitpicks resolved