Add LibreTranslate module, add separate envs for it in Makefile

Makefile

@@ -3,9 +3,29 @@ default: run
 
 include client/make.mk
 
+LIBRETRANSLATE_PYTHON_VERSION = 3.10.12
+
+ifeq ($(shell command -v pyenv 2> /dev/null),)
+    HAS_PYENV = false
+else
+    HAS_PYENV = true
+endif
+
+.PHONY: setup
+setup: setup_pyenv setup_venvs
+
+.PHONY: setup_pyenv
+setup_pyenv:
+ifeq ($(HAS_PYENV),true)
+	pyenv install -s $(LIBRETRANSLATE_PYTHON_VERSION)
+endif
+
+.PHONY: setup_venvs
+setup_venvs: venv libretranslate_venv
+
 .PHONY: run
 run: $(CLIENT_TARGETS) venv
-	source venv/bin/activate && python main.py
+	. venv/bin/activate && python main.py
 
 .PHONY: build
 build: $(CLIENT_TARGETS)
@@ -18,13 +38,26 @@ test: client_test
 
 .PHONY: clean
 clean: client_clean
-	rm -rf __pycache__
+	rm -rf **pycache**
 	rm -rf venv
+	rm -rf libretranslate_venv
 	rm -f pythagoras.tar.xz
 
 venv:
 	python -m venv venv
-	source venv/bin/activate && pip install --upgrade pip && pip install -r requirements.txt
+	. venv/bin/activate && pip install --upgrade pip && pip install -r requirements.txt
+
+libretranslate_venv:
+ifeq ($(HAS_PYENV),true)
+	PYENV_VERSION=$(LIBRETRANSLATE_PYTHON_VERSION) pyenv exec python -m venv libretranslate_venv
+else
+	@exit 1
+endif
+	. libretranslate_venv/bin/activate && pip install --upgrade pip && pip install -r libretranslate_requirements.txt
+
+.PHONY: start_libretranslate
+start_libretranslate: libretranslate_venv
+	. libretranslate_venv/bin/activate && libretranslate --port 5000 --load-only en,cs
 
 pythagoras.tar.xz: main.py $(CLIENT_TARGETS)
 	tar --transform='s|^|pythagoras/|' -Jcvf $@ $^