chore: set up Makefile, linting, and dockerized dev shell

Makefile

@@ -0,0 +1,42 @@
+.PHONY: install dev lint shell task-list task-add task-done task-update
+
+# Installation
+install:
+	cd client && npm install
+	cd server && npm install
+	pip install duckdb ruff
+
+# Development
+dev:
+	docker compose up --build
+
+# Linting
+lint:
+	cd client && npm run lint || true
+	ruff check tasks/
+
+# Docker Shell
+shell:
+	docker compose run --rm dev-shell
+
+# Task Tracker Integration
+PYTHON=python3
+TASK_CLI=tasks/cli.py
+
+task-list:
+	$(PYTHON) $(TASK_CLI) list
+
+task-add:
+	$(PYTHON) $(TASK_CLI) add "$(title)"
+
+task-done:
+	$(PYTHON) $(TASK_CLI) done $(id)
+
+task-update:
+	$(PYTHON) $(TASK_CLI) update $(id) $(status)
+
+task-delete:
+	$(PYTHON) $(TASK_CLI) delete $(id)
+
+task-filter:
+	$(PYTHON) $(TASK_CLI) list --status $(status)