feat: allow `files rm --force`

**Is your feature request related to a problem? Please describe.**
It's possible for users to get into a state where they have non-unixfs files in MFS, which will result in errors like `Error: unrecognized node type in cache node`.

When non-unixfs files are in MFS, removal of those files will fail in webui without error.

They also fail to be removed in the command line unless `rm --force` is used.

**Describe the solution you'd like**
When a user attempts to remove a file, we should provide an option to "force" remove the file.

**Describe alternatives you've considered**

We may also want to enable a fallback prompt to "force" remove files when a user attempts to remove a file and it fails.

**Additional context**

We should also prevent users from adding/importing non-unixfs files via the webui (I believe I added the files that got me into this state via the webui)

**Code that needs updated**

- https://github.com/ipfs/ipfs-webui/blob/5abc5d07630cef5a62d05194053e678750012d18/src/files/modals/add-by-path-modal/AddByPathModal.js#L25-L31

**Related issues**

* https://github.com/ipfs/ipfs-webui/issues/2158#issuecomment-1714359513
* https://ipshipyard.slack.com/archives/C04M8232QRW/p1706905541073949
* https://github.com/ipfs/kubo/issues/8144
* https://github.com/ipfs/kubo/issues/7999
* https://github.com/ipfs/kubo/issues/10331

```[tasklist]
### Tasks
- [ ] validate unixfs content at /src/files/modals/add-by-path-modal/AddByPathModal.js#L25-L31
```