feat: Adds label filtering on projects

[SvenW]

Description

Closes #6298

Multiple labels supported and updates the query string so it's possible to share links between users. I now noticed that the issue hasn't been fully accepted but we've hit the same limitation as well and really needed the feature...

Checklist

Eligibility

• Linked to an existing issue with no blocking labels (kind/proposal, needs discussion, needs research, maintainer only, area/security, size/large, size/x-large, size/xx-large).
• Changes documentation only.
• Changes ten lines or fewer.

Quality

• Adds or updates corresponding tests.
• Adds or updates corresponding documentation.

AI Use Disclosure

This PR was written:

• By a human without AI assistance.
• By a human with AI assistance. A human has reviewed every line prior to opening the PR.
• By an AI with human supervision. A human has reviewed every line prior to opening the PR.
• Entirely by an AI. No human has reviewed this prior to opening the PR.

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[kargo-governance-bot]

Automated Policy Notice

This pull request has been converted to a draft because the linked issue (#6298) has not been unblocked for external contribution. Maintainers do not routinely review drafts.

The issue currently has the following blocking label(s): kind/proposal

To move forward:

1. Wait for a maintainer to review the issue and remove any blocking labels
2. Ensure the implementation in this PR is consistent with discussion points in the linked issue
3. Mark the PR ready for review

See the Contributor Guide for full details.

[kargo-governance-bot]

Automated Policy Notice

This pull request has been converted to a draft because the linked issue (#6298) has not been unblocked for external contribution. Maintainers do not routinely review drafts.

The issue currently has the following blocking label(s): kind/proposal

To move forward:

1. Wait for a maintainer to review the issue and remove any blocking labels
2. Ensure the implementation in this PR is consistent with discussion points in the linked issue
3. Mark the PR ready for review

See the Contributor Guide for full details.

[kargo-governance-bot]

Automated Policy Notice

This pull request has been converted to a draft because the linked issue (#6298) has not been unblocked for external contribution. Maintainers do not routinely review drafts.

The issue currently has the following blocking label(s): kind/proposal

To move forward:

1. Wait for a maintainer to review the issue and remove any blocking labels
2. Ensure the implementation in this PR is consistent with discussion points in the linked issue
3. Mark the PR ready for review

See the Contributor Guide for full details.