Prototype schema browser

[JeremyMcCormick]

Checklist

• Ran Jenkins
• Added a release note for user-visible changes to docs/changes

[codecov]

❌ 1 Tests Failed:

Tests completed	Failed	Passed	Skipped
174	1	173	0

View the top 1 failed test(s) by shortest run time

tests/test_browser.py::BrowserTestCase::test_browser_site_icon

Stack Traces | 0.111s run time

self = <tests.test_browser.BrowserTestCase testMethod=test_browser_site_icon>

        def test_browser_site_icon(self) -> None:
            """Render a centered header icon and optional link when configured."""
            schema_yaml = """
    name: demo
    "@id": "#demo"
    tables:
      - name: ChildTable
        "@id": "#ChildTable"
        columns:
          - name: code
            "@id": "#ChildTable.code"
            datatype: int
    """.strip()
    
            with tempfile.TemporaryDirectory(dir=TEST_DIR) as tmpdir:
                schema_path = os.path.join(tmpdir, "icon.yaml")
                output_dir = os.path.join(tmpdir, "browser")
                icon_path = os.path.join(tmpdir, "icon.png")
                with open(schema_path, "w", encoding="utf-8") as f:
                    f.write(schema_yaml)
                with open(icon_path, "wb") as f:
                    f.write(b"\x89PNG\r\n\x1a\n")
    
                render_browser_site(
                    output_dir=output_dir,
                    files=[schema_path],
                    site_icon=icon_path,
                    icon_link_url="https://www.lsst.org",
                )
    
                self.assertTrue(os.path.exists(os.path.join(output_dir, "assets", "site-icon.png")))
                index_soup = get_page_soup_by_title(output_dir, "Home")
    
                # Validate icon link wrapper and image source in rendered home
                # page.
>               self.assertIsNotNone(
                    index_soup.find("a", class_="header-site-icon-link", href="https://www.lsst.org")
                )
E               AssertionError: unexpectedly None

tests/test_browser.py:565: AssertionError

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