Hotfix changes to the main branch (#167)

- hotfix changes -- resolving issues with sidebar, datagrid views, and datagrid interactions. adding missing synchronization to ensure even behavior across the app
- removing redundancy, updating modules
- Wide-scale repairs and changes. App behavior and structuring needs to be standardized, and generalized cleanup/reformatting was implemented.
- upgrading eslint (v9) caused system-wide errors, downgraded to v8
- also downgraded eslint plugins (some were compatible with v9, some weren't)
- applying eslint fixes across project (remove unused imports, etc)
- fixing no-null-asserted-optional-chain
- fixing prefer-const
- removing unneeded package.json commands (also attached fixed versions to all modules instead of using latest)
- continuing hotfix refinement. Clarifying datagrid view. Attempting to ensure that data is even across MSV datagrid output and date follows established convention
- continuing bug repairs and addressing missing or partially implemented behavior. core datagrid changes incoming, so saving changes here so that I can rewind if need be.
- remaining hotfix changes -- resolving core behavior and repairing census upload, validation processing, and all other file upload systems. remaining notes: need to add a conditional to the upload system to lock it when the census is closed/not opened
- resolving earlier commit note -- upload conditional added to lock function if census is not opened.

frontend/.eslintrc.js

@@ -0,0 +1,18 @@
+module.exports = {
+  parser: "@typescript-eslint/parser",
+  extends: ["next", "plugin:@typescript-eslint/recommended"],
+  settings: {
+    next: {
+      rootDir: "."
+    }
+  },
+  plugins: ["@typescript-eslint", "unused-imports"],
+  rules: {
+    "react-hooks/exhaustive-deps": "off",
+    "semi": ["error", "always"],
+    "unused-imports/no-unused-imports": "error",
+    "@typescript-eslint/no-explicit-any": "off",
+    "@typescript-eslint/no-unused-vars": "off",
+    "unused-imports/no-unused-vars": "off"
+  }
+};