feat: migrate MTProxyMax to Gitea + bump telemt engine to v3.0.13

- All install/README URLs point to git.samnet.dev
- Container registry switched to Gitea
- GitHub Actions converted to Gitea Actions
- Engine bumped from v3.0.7 to v3.0.13 (TLS full cert, ME stability, pool hardswap)
- Self-update mechanism stays on GitHub (pending account restoration)

install.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+# MTProxyMax Quick Installer — SamNet Technologies
+# Usage: curl -sL https://git.samnet.dev/SamNet-dev/MTProxyMax/raw/branch/main/install.sh | sudo bash
+set -e
+SCRIPT_URL="https://git.samnet.dev/SamNet-dev/MTProxyMax/raw/branch/main/mtproxymax.sh"
+if [ "$(id -u)" -ne 0 ]; then echo "Run as root: curl -sL $SCRIPT_URL | sudo bash" >&2; exit 1; fi
+curl -fsSL "$SCRIPT_URL" -o /tmp/mtproxymax.sh && bash /tmp/mtproxymax.sh install && rm -f /tmp/mtproxymax.sh