chore: remove .github workflows (act only uses .gitea)

- unit: fixture shapes, mock API (GET/POST/PUT/DELETE), mock DB CRUD
- integration: real DB list, create, get, update, delete, not-found cases
- e2e: handler calls with mock context + real DB, covers 400/403/404 cases

.github/workflows/deploy.yml

@@ -1,27 +0,0 @@
-name: "Build and push image"
-
-on:
-  push:
-    branches:
-      - main
-
-jobs:
-  deploy:
-    name: "Build Docker image"
-    runs-on: ubuntu-latest
-    steps:
-      - name: Login to Docker Hub
-        uses: docker/login-action@v3
-        with:
-          registry: registry.docker.polytech.djalim.fr
-          username: ${{ secrets.registry_login }}
-          password: ${{ secrets.registry_pass }}
-
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
-
-      - name: Build and push
-        uses: docker/build-push-action@v6
-        with:
-          push: true
-          tags: registry.docker.polytech.djalim.fr/polympr:latest

.github/workflows/lint.yml

@@ -1,30 +0,0 @@
-name: "Check Deno code"
-
-on:
-  pull_request:
-    branches:
-      - main
-      - develop
-  push:
-    branches:
-      - develop
-
-permissions:
-  contents: read
-
-jobs:
-  check-code:
-    name: "Check Deno code"
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-
-      - uses: denoland/setup-deno@v2
-        with:
-          deno-version: v2.x
-
-      - name: Check formatting
-        run: deno fmt --check
-
-      - name: Check linting
-        run: deno lint