Stub strings for potential tweaks to login flow

[indirectlylit]

Summary

adding a few strings that might be helpful in updates to the login flow

Reviewer guidance

does it pass?

Contributor Checklist

PR process:

• PR has the correct target branch and milestone
• PR has 'needs review' or 'work-in-progress' label
• If PR is ready for review, a reviewer has been added. (Don't use 'Assignees')
• If this is an important user-facing change, PR or related issue has a 'changelog' label
• If this includes an internal dependency change, a link to the diff is provided

Testing:

• Contributor has fully tested the PR manually
• If there are any front-end changes, before/after screenshots are included
• Critical user journeys are covered by Gherkin stories
• Critical and brittle code paths are covered by unit tests

Reviewer Checklist

• Automated test coverage is satisfactory
• PR is fully functional
• PR has been tested for accessibility regressions
• External dependency files were updated if necessary (yarn and pip)
• Documentation is updated
• Contributor is in AUTHORS.md

[codecov]

Codecov Report

Merging #7053 into release-v0.14.x will not change coverage.
The diff coverage is n/a.

Impacted Files	Coverage Δ
...plugins/facility/assets/src/views/CsvInfoModal.vue	0.00% <ø> (ø)
...libri/plugins/user/assets/src/views/SignInPage.vue	34.59% <ø> (ø)

[indirectlylit]

self merge - unrelated failure