fix: add user visibility description in settings page (#8121)

Closes: #7501

## Checklist

The [contributor guide](https://forgejo.org/docs/next/contributor/) contains information that will be helpful to first time contributors. There also are a few [conditions for merging Pull Requests in Forgejo repositories](https://codeberg.org/forgejo/governance/src/branch/main/PullRequestsAgreement.md). You are also welcome to join the [Forgejo development chatroom](https://matrix.to/#/#forgejo-development:matrix.org).

### Tests

- I added test coverage for Go changes...
  - [ ] in their respective `*_test.go` for unit tests.
  - [ ] in the `tests/integration` directory if it involves interactions with a live Forgejo server.
- I added test coverage for JavaScript changes...
  - [ ] in `web_src/js/*.test.js` if it can be unit tested.
  - [ ] in `tests/e2e/*.test.e2e.js` if it requires interactions with a live Forgejo server (see also the [developer guide for JavaScript testing](https://codeberg.org/forgejo/forgejo/src/branch/forgejo/tests/e2e/README.md#end-to-end-tests)).
Closes: #7501

### Documentation

- [ ] I created a pull request [to the documentation](https://codeberg.org/forgejo/docs) to explain to Forgejo users how to use this change.
- [ ] I did not document these changes and I do not expect someone else to do it.

### Release notes

- [ ] I do not want this change to show in the release notes.
- [ ] I want the title to show in the release notes with a link to this pull request.
- [ ] I want the content of the `release-notes/<pull request number>.md` to be be used for the release notes instead of the title.

Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/8121
Reviewed-by: Gusted <gusted@noreply.codeberg.org>
Reviewed-by: Beowulf <beowulf@beocode.eu>
Co-authored-by: Shalabh Agarwal <shalabhagarwal1024@gmail.com>
Co-committed-by: Shalabh Agarwal <shalabhagarwal1024@gmail.com>

options/locale_next/locale_en-US.json

@@ -93,5 +93,6 @@
     "editor.textarea.tab_hint": "Line already indented. Press <kbd>Tab</kbd> again or <kbd>Escape</kbd> to leave the editor.",
     "editor.textarea.shift_tab_hint": "No indentation on this line. Press <kbd>Shift</kbd> + <kbd>Tab</kbd> again or <kbd>Escape</kbd> to leave the editor.",
     "admin.dashboard.cleanup_offline_runners": "Cleanup offline runners",
+    "settings.visibility.description": "Profile visibility affects others' ability to access your non-private repositories. <a href=\"%s\" target=\"_blank\">Learn more</a>",
     "meta.last_line": "Thank you for translating Forgejo! This line isn't seen by the users but it serves other purposes in the translation management. You can place a fun fact in the translation instead of translating it."
 }

templates/user/settings/profile.tmpl

@@ -83,6 +83,7 @@
 								{{end}}
 							</div>
 						</div>
+						<span class="help">{{ctx.Locale.Tr "settings.visibility.description" "https://forgejo.org/docs/latest/user/repo-permissions/#profile-and-visibility"}}</span>
 					</label>
 
 					<label>