chore: remove CodeSee integration

CodeSee is shutting down: https://www.linkedin.com/posts/shaneak_i-am-very-sad-to-announce-officially-activity-7163970333912289281-DaOb

.github/workflows/codesee-arch-diagram.yml

@@ -1,22 +0,0 @@
-# This workflow was added by CodeSee. Learn more at https://codesee.io/
-# This is v2.0 of this workflow file
-on:
-  push:
-    branches:
-      - main
-  pull_request_target:
-    types: [opened, synchronize, reopened]
-
-name: CodeSee
-
-permissions: read-all
-
-jobs:
-  codesee:
-    runs-on: ubuntu-latest
-    continue-on-error: true
-    name: Analyze the repo with CodeSee
-    steps:
-      - uses: Codesee-io/codesee-action@v2
-        with:
-          codesee-token: ${{ secrets.CODESEE_ARCH_DIAG_API_TOKEN }}