chore: move business tooling out of the public library; tidy filestore naming

Keep the public tree project-generic. Business/one-off tools, deployment
and business docs move to the private oo-workspace repo.

Moved to oo-workspace:
- cmd/ooscan, cmd/pdfamount, cmd/kontoblatt, cmd/kontolink
- internal/xlspipe (cutover-portugal workbook) -> oow workbook build
  (drops the --template/--title flags from oo docs put-xlsx)
- deploy/docker-compose.rclone-webdav.yml + docs/rclone-webdav.md
- docs/crm-associations.md

Removed GitHub-era leftovers:
- .github/workflows/release-please.yml, release-please-config.json,
  .release-please-manifest.json (tags are created on Gitea per SemVer)

Naming: the FileStore subsystem is now filestore_*.go (was file_*.go) to
match files_*.go (project Documents). Docs/AGENTS/README updated.

.github/workflows/release-please.yml

@@ -1,42 +0,0 @@
-name: Release Please
-
-on:
-  push:
-    branches: [main]
-  workflow_dispatch:
-
-permissions:
-  contents: write
-  pull-requests: write
-  issues: write
-  actions: write
-
-jobs:
-  release-please:
-    name: Release Please
-    if: github.server_url == 'https://github.com'
-    runs-on: ubuntu-latest
-    steps:
-      - name: Run release-please
-        uses: googleapis/release-please-action@v4
-        id: release
-        with:
-          config-file: release-please-config.json
-          manifest-file: .release-please-manifest.json
-          token: ${{ secrets.RELEASE_PLEASE_TOKEN != '' && secrets.RELEASE_PLEASE_TOKEN || secrets.GITHUB_TOKEN }}
-
-      # Tags/releases created with GITHUB_TOKEN do not trigger other workflows
-      # (push:tags on Release.yml never fires). Dispatch GoReleaser explicitly.
-      - name: Trigger GoReleaser
-        if: ${{ steps.release.outputs.release_created == 'true' }}
-        env:
-          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          TAG: ${{ steps.release.outputs.tag_name }}
-        run: |
-          set -euo pipefail
-          echo "Dispatching Release workflow for $TAG"
-          gh workflow run release.yml --repo "${{ github.repository }}" -f "tag=${TAG}"
-
-    outputs:
-      release_created: ${{ steps.release.outputs.release_created }}
-      tag_name: ${{ steps.release.outputs.tag_name }}

.github/workflows/release.yml

@@ -20,8 +20,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       # Always clone default branch first. workflow_dispatch often races with
-      # release-please creating the tag; fetching refs/tags/X before it exists
-      # fails checkout. Retry fetch, then check out the tag.
+      # tag creation; fetching refs/tags/X before it exists fails checkout.
+      # Retry fetch, then check out the tag.
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0