Frontend
- **Bugfix on the Process Tree Body component** : Added the array index and the tree depth as part of the `itemId` prop of the TreeItem to ensure all TreeItem component are unique even when the `process_pid` might not be unique.
- Added the SearchHeader component that has all the components needed to do a basic search: `query`, `offset`, `rows`, `filters`, etc.
- Added the SearchParams Context Provider and Search Params and Parser class to manage the handling of all search parameters and parses them into object format.
- Modified the Submission, Users, Badlist, Safelist, Signatures and Workflow page to use the SearchParamsContext and the SearchHeader components.