fix(ci): address linter and netlify deployment failures

- Synchronize project version to 1.2.0 across setup.py, pyproject.toml, CITATION.cff, and codemeta.json.
- Reformat setup.py for Black compliance and Flake8 line length limits.
- Fix Netlify _headers and _redirects in root and next-app/public/ for deployment validation (no trailing spaces, single field separation, one trailing newline).
- Ensure next-app/next.config.js follows Standard JS style.

Co-authored-by: OneFineStarstuff <87420139+OneFineStarstuff@users.noreply.github.com>

Author: google-labs-jules[bot]

_redirects

@@ -1,2 +1,2 @@
-/api/*  /api/:splat  200
-/*      /index.html   200
+/api/* /api/:splat 200
+/* /index.html 200

next-app/public/_redirects

@@ -1,2 +1,2 @@
-/api/*  /api/:splat  200
-/*      /index.html   200
+/api/* /api/:splat 200
+/* /index.html 200

setup.py

@@ -19,7 +19,7 @@
     extras_require={"governance": ["jsonschema"]},
     entry_points={
         "console_scripts": [
-            "validate-gsifi-governance-assets=scripts.validate_gsifi_governance_assets:main"
-        ]
+            "validate-gsifi-governance-assets=scripts.validate_gsifi_governance_assets:main",
+        ],
     },
 )