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

photon-client/src/components/dashboard/StreamConfigCard.vue

@@ -21,7 +21,9 @@ const processingMode = computed<number>({
 
 <template>
   <v-card
-    :disabled="useCameraSettingsStore().isDriverMode || useStateStore().colorPickingMode"
+    :disabled="
+      useCameraSettingsStore().isDriverMode || useCameraSettingsStore().isFocusMode || useStateStore().colorPickingMode
+    "
     class="mt-3 rounded-12"
     color="surface"
     style="flex-grow: 1; display: flex; flex-direction: column"