Add Camera Focus Mode (#2180)

## Description
 
Camera focus tool pipeline using a Laplacian and finding the variance.
Similar to Limelight.


closes #1597 

## Meta

Merge checklist:
- [x] Pull Request title is [short, imperative
summary](https://cbea.ms/git-commit/) of proposed changes
- [x] The description documents the _what_ and _why_
- [x] This PR has been
[linted](https://docs.photonvision.org/en/latest/docs/contributing/linting.html).
- [x] If this PR changes behavior or adds a feature, user documentation
is updated
- [ ] If this PR touches photon-serde, all messages have been
regenerated and hashes have not changed unexpectedly
- [ ] If this PR touches configuration, this is backwards compatible
with settings back to v2025.3.2
- [x] If this PR touches pipeline settings or anything related to data
exchange, the frontend typing is updated
- [ ] If this PR addresses a bug, a regression test for it is added

docs/source/docs/quick-start/camera-focusing.md

@@ -0,0 +1,19 @@
+# Camera Focusing
+
+## Prepare Camera
+:::{warning}
+Refocusing your camera **will** make your calibration inaccurate, make sure to recalibrate after focusing.
+:::
+To ensure that your camera is focused properly, mount it to a secure surface and ensure it does not move drastically. Point your camera at a detailed surface like a calibration board, and make sure that it not too close to the camera.
+
+## Using Focus Mode
+:::{important}
+When you enable Focus Mode, it will assign a *Score* to the current focus, this score depends on your environment and the lighting. This score cannot be compared to a focus score collected from other environments.
+:::
+- In the Cameras tab, turn on Focus Mode.
+- Rotate the lens on your camera to try and get the focus score as high as possible.
+- Once you cannot get a higher score, this indicates that your camera is fully focused and can be set in place using glue if desired.
+
+```{image} images/focusModeExample.png
+:scale: 50%
+```

docs/source/docs/quick-start/index.md

@@ -9,5 +9,6 @@ wiring
 networking
 camera-matching
 camera-calibration
+camera-focusing
 quick-configure
 ```