feat: add teams (#848)

## Description

Add support for teams which will allow users to collaborate on
documents.

Teams features allows users to:

- Create, manage and transfer teams
- Manage team members
- Manage team emails
- Manage a shared team inbox and documents

These changes do NOT include the following, which are planned for a
future release:

- Team templates
- Team API
- Search menu integration

## Testing Performed

- Added E2E tests for general team management
- Added E2E tests to validate document counts

## Checklist

- [X] I have tested these changes locally and they work as expected.
- [X] I have added/updated tests that prove the effectiveness of these
changes.
- [ ] I have updated the documentation to reflect these changes, if
applicable.
- [X] I have followed the project's coding style guidelines.

packages/lib/utils/params.ts

@@ -0,0 +1,30 @@
+/**
+ * From an unknown string, parse it into an integer array.
+ *
+ * Filter out unknown values.
+ */
+export const parseToIntegerArray = (value: unknown): number[] => {
+  if (typeof value !== 'string') {
+    return [];
+  }
+
+  return value
+    .split(',')
+    .map((value) => parseInt(value, 10))
+    .filter((value) => !isNaN(value));
+};
+
+type GetRootHrefOptions = {
+  returnEmptyRootString?: boolean;
+};
+
+export const getRootHref = (
+  params: Record<string, string | string[]> | null,
+  options: GetRootHrefOptions = {},
+) => {
+  if (typeof params?.teamUrl === 'string') {
+    return `/t/${params.teamUrl}`;
+  }
+
+  return options.returnEmptyRootString ? '' : '/';
+};