Remove placeholder workflows and ci-base manifest

Keep only test.yaml workflow for now. Container build workflows
and ci-base Dockerfile will be added in a future PR.

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

.forgejo/workflows/build-ci-base.yaml

@@ -1,37 +0,0 @@
-name: Build CI base image
-
-on:
-  push:
-    tags:
-      - 'ci-base-v*'
-  workflow_dispatch:
-    inputs:
-      version:
-        description: 'Version (e.g. v1.0.0)'
-        required: true
-
-jobs:
-  build:
-    runs-on: docker-builder
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-
-      - name: Extract version from tag
-        id: version
-        run: |
-          if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
-            VERSION="${{ github.event.inputs.version }}"
-          else
-            # Extract version from tag: ci-base-v1.0.0 -> v1.0.0
-            VERSION="${GITHUB_REF_NAME#ci-base-}"
-          fi
-          echo "version=$VERSION" >> "$GITHUB_OUTPUT"
-          echo "Building version: $VERSION"
-
-      - name: Build and push
-        uses: ./.forgejo/actions/build-push-image
-        with:
-          context: argocd/manifests/ci-base
-          image_name: blumeops/ci-base
-          version: ${{ steps.version.outputs.version }}

.forgejo/workflows/build-devpi.yaml

@@ -1,37 +0,0 @@
-name: Build devpi
-
-on:
-  push:
-    tags:
-      - 'devpi-v*'
-  workflow_dispatch:
-    inputs:
-      version:
-        description: 'Version (e.g. v1.0.0)'
-        required: true
-
-jobs:
-  build:
-    runs-on: docker-builder
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-
-      - name: Extract version from tag
-        id: version
-        run: |
-          if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
-            VERSION="${{ github.event.inputs.version }}"
-          else
-            # Extract version from tag: devpi-v1.0.0 -> v1.0.0
-            VERSION="${GITHUB_REF_NAME#devpi-}"
-          fi
-          echo "version=$VERSION" >> "$GITHUB_OUTPUT"
-          echo "Building version: $VERSION"
-
-      - name: Build and push
-        uses: ./.forgejo/actions/build-push-image
-        with:
-          context: argocd/manifests/devpi
-          image_name: blumeops/devpi
-          version: ${{ steps.version.outputs.version }}

argocd/manifests/ci-base/Dockerfile

@@ -1,58 +0,0 @@
-# CI base image for Forgejo Actions
-# Used by forgejo-runner for ubuntu-latest and ubuntu-22.04 labels
-FROM ubuntu:22.04
-
-# Prevent interactive prompts during package installation
-ENV DEBIAN_FRONTEND=noninteractive
-
-# Install common CI tools
-RUN apt-get update && apt-get install -y --no-install-recommends \
-    # Essential tools
-    ca-certificates \
-    curl \
-    wget \
-    git \
-    jq \
-    unzip \
-    zip \
-    # Build tools
-    build-essential \
-    make \
-    # Python
-    python3 \
-    python3-pip \
-    python3-venv \
-    # Node.js (via nodesource for LTS)
-    && curl -fsSL https://deb.nodesource.com/setup_22.x | bash - \
-    && apt-get install -y nodejs \
-    # Docker CLI (not the daemon - we mount the socket)
-    && install -m 0755 -d /etc/apt/keyrings \
-    && curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc \
-    && chmod a+r /etc/apt/keyrings/docker.asc \
-    && echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/ubuntu $(. /etc/os-release && echo "$VERSION_CODENAME") stable" > /etc/apt/sources.list.d/docker.list \
-    && apt-get update \
-    && apt-get install -y docker-ce-cli \
-    # Clean up
-    && apt-get clean \
-    && rm -rf /var/lib/apt/lists/*
-
-# Create a non-root user for running jobs
-RUN useradd -m -s /bin/bash runner \
-    && mkdir -p /home/runner/work \
-    && chown -R runner:runner /home/runner
-
-# Set working directory
-WORKDIR /home/runner/work
-
-# Default to runner user
-USER runner
-
-# Verify installations
-RUN echo "=== CI Base Image ===" \
-    && git --version \
-    && node --version \
-    && npm --version \
-    && python3 --version \
-    && docker --version \
-    && make --version | head -1 \
-    && gcc --version | head -1