## Describe your changes

`lib/streamlit/elements/image.py` contained a bunch of utils functions
that were imported in other files, which caused cyclic imports in #9711.
This PR moves all of these functions into
`lib/streamlit/elements/lib/image_utils.py` and makes all other files
import directly from there.

Unfortunately, this PR didn't remove all cyclic imports. But it's still
worth merging this to clean up our codebase a bit more.

## GitHub Issue Link (if applicable)

Just a refactor, no new functionality or tests added. 

## Testing Plan

---

**Contribution License Agreement**

By submitting this pull request you agree that all contributions to this
project are made under the Apache 2.0 license.

---------

Co-authored-by: Johannes Rieke <[email protected]>

## Describe your changes

This adds pathlib support for `AppTest.from_file` and
`st.components.v1.declare_component`. Follow-up for #9711.

## GitHub Issue Link (if applicable)

## Testing Plan

Added Python unit tests for both functions.

---

**Contribution License Agreement**

By submitting this pull request you agree that all contributions to this
project are made under the Apache 2.0 license.

---------

Co-authored-by: Johannes Rieke <[email protected]>

## Describe your changes

`lib/streamlit/elements/image.py` contained a bunch of utils functions
that were imported in other files, which caused cyclic imports in streamlit#9711.
This PR moves all of these functions into
`lib/streamlit/elements/lib/image_utils.py` and makes all other files
import directly from there.

Unfortunately, this PR didn't remove all cyclic imports. But it's still
worth merging this to clean up our codebase a bit more.

## GitHub Issue Link (if applicable)

Just a refactor, no new functionality or tests added. 

## Testing Plan

---

**Contribution License Agreement**

By submitting this pull request you agree that all contributions to this
project are made under the Apache 2.0 license.

---------

Co-authored-by: Johannes Rieke <[email protected]>

## Describe your changes

Adds support for pathlib.Path to the following commands:

- st.image
- st.audio
- st.video
- st.set_page_config
- st.switch_page
- st.page_link
- st.logo
- st.html
- st.Page
- st.chat_message

I also refactored some code snippets that use test assets to use
pathlib.

## GitHub Issue Link (if applicable)

## Testing Plan

I added small unit tests and e2e tests for most commands. Some notes:

- st.audio didn't have e2e tests for local files at all, so I added
some.
- st.switch_page doesn't seem to have unit tests, so I only added an e2e
test.
- st.page_link already had a unit test for pathlib. 
- For st.logo, I didn't add an e2e test because you can only test it
once per app, and adding another app just for this seemed overkill. It
uses the same logic as st.image under the hood though.
- st.html already had a unit test for pathlib. It didn't have an e2e
test for files at all, so I added some (both for str paths and for
pathlib).

---

**Contribution License Agreement**

By submitting this pull request you agree that all contributions to this
project are made under the Apache 2.0 license.

---------

Co-authored-by: Johannes Rieke <[email protected]>

## Describe your changes

This adds pathlib support for `AppTest.from_file` and
`st.components.v1.declare_component`. Follow-up for streamlit#9711.

## GitHub Issue Link (if applicable)

## Testing Plan

Added Python unit tests for both functions.

---

**Contribution License Agreement**

By submitting this pull request you agree that all contributions to this
project are made under the Apache 2.0 license.

---------

Co-authored-by: Johannes Rieke <[email protected]>