Remove Dependabot and auto-update workflows

Manual dependency management is simpler and gives more control.

.claude/settings.local.json

@@ -25,7 +25,8 @@
       "Bash(Select-String -Pattern \"Checking|Finished|error\")",
       "Bash(Select-Object -First 20)",
       "Bash(git restore:*)",
-      "Bash(test:*)"
+      "Bash(test:*)",
+      "Bash(gh pr list:*)"
     ],
     "deny": [],
     "ask": []

.github/dependabot.yml

@@ -1,34 +0,0 @@
-version: 2
-updates:
-  - package-ecosystem: "cargo"
-    directory: "/"
-    schedule:
-      interval: "weekly"
-      day: "monday"
-    open-pull-requests-limit: 10
-    reviewers:
-      - "pandaadir05"
-    labels:
-      - "dependencies"
-      - "rust"
-    commit-message:
-      prefix: "chore"
-      include: "scope"
-    groups:
-      dev-dependencies:
-        dependency-type: "development"
-        update-types:
-          - "minor"
-          - "patch"
-
-  - package-ecosystem: "github-actions"
-    directory: "/"
-    schedule:
-      interval: "weekly"
-      day: "monday"
-    open-pull-requests-limit: 5
-    labels:
-      - "dependencies"
-      - "github-actions"
-    commit-message:
-      prefix: "ci"

.github/workflows/dependencies.yml

@@ -1,36 +0,0 @@
-name: Dependency Management
-
-on:
-  schedule:
-    - cron: '0 0 * * 1'
-  workflow_dispatch:
-
-permissions:
-  contents: write
-  pull-requests: write
-
-jobs:
-  update-dependencies:
-    name: Update Dependencies
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-
-      - name: Install Rust toolchain
-        uses: dtolnay/rust-toolchain@stable
-
-      - name: Update dependencies
-        run: cargo update
-
-      - name: Create Pull Request
-        uses: peter-evans/create-pull-request@v5
-        with:
-          commit-message: Update Cargo dependencies
-          title: 'chore: update Cargo dependencies'
-          body: |
-            Automated dependency update generated by GitHub Actions.
-
-            Please review the changes and ensure all tests pass before merging.
-          branch: deps/cargo-update
-          delete-branch: true