feat: add prek pre-commit hooks and dependabot (#1720)

* feat: add prek pre-commit hooks and dependabot

Pre-commit hooks (via prek):
- Basic hygiene: trailing-whitespace, end-of-file-fixer, check-yaml, check-added-large-files, check-merge-conflict
- Security: detect-secrets, zizmor (GitHub Actions audit)
- Linting: shellcheck, actionlint, oxlint, swiftlint
- Formatting: oxfmt, swiftformat

Dependabot:
- npm and GitHub Actions ecosystems
- Grouped updates (production/development/actions)
- 7-day cooldown for supply chain protection

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* docs: add prek install instruction to AGENTS.md

---------

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

apps/macos/Sources/Clawdbot/Resources/DeviceModels/LICENSE.apple-device-identifiers.txt

@@ -18,4 +18,4 @@ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
+SOFTWARE.

apps/macos/Sources/Clawdbot/Resources/DeviceModels/ios-device-identifiers.json

@@ -173,4 +173,4 @@
   "iPod5,1": "iPod touch (5th generation)",
   "iPod7,1": "iPod touch (6th generation)",
   "iPod9,1": "iPod touch (7th generation)"
-}
+}

apps/macos/Sources/Clawdbot/Resources/DeviceModels/mac-device-identifiers.json

@@ -211,4 +211,4 @@
     "Mac Pro (2019)",
     "Mac Pro (Rack, 2019)"
   ]
-}
+}