Revert "refactor: extract userbot to standalone repo, add as git submodule"

This reverts commit 3c383db9a7.

userbot/Dockerfile

@@ -0,0 +1,28 @@
+FROM python:3.11-slim AS builder
+
+WORKDIR /src
+COPY requirements.txt .
+RUN pip install --no-cache-dir --user -r requirements.txt
+
+FROM python:3.11-slim
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    git \
+    mediainfo \
+    wget \
+    xz-utils \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN wget -qO- https://johnvansickle.com/ffmpeg/releases/ffmpeg-release-amd64-static.tar.xz | \
+    tar xJ && \
+    cp ffmpeg-*-static/ffmpeg /usr/local/bin/ && \
+    cp ffmpeg-*-static/ffprobe /usr/local/bin/ && \
+    rm -rf ffmpeg-*
+
+COPY --from=builder /root/.local /usr/local
+COPY . /app
+WORKDIR /app
+
+ENV PYTHONUNBUFFERED=1
+
+CMD ["python", "-u", "main.py"]