feat: add Commands enum, delete useless commands, revamp the Settings class and the MarkovChain.message_handler method

.pre-commit-config.yaml

@@ -0,0 +1,36 @@
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.6.0
+    hooks:
+      - id: trailing-whitespace
+        args: [ --markdown-linebreak-ext=md ]
+      - id: end-of-file-fixer
+      - id: check-ast
+      - id: check-added-large-files
+      - id: check-byte-order-marker
+      - id: check-case-conflict
+      - id: check-docstring-first
+      - id: check-merge-conflict
+      - id: check-toml
+      - id: debug-statements
+      - id: mixed-line-ending
+        args: [ --fix=lf ]
+
+  - repo: https://github.com/charliermarsh/ruff-pre-commit
+    rev: v0.6.4
+    hooks:
+      - id: ruff
+        args:
+          - --fix
+          - --exit-non-zero-on-fix
+      - id: ruff-format
+
+
+  - repo: local
+    hooks:
+
+      - id: mypy
+        name: mypy
+        entry: uv run mypy
+        language: system
+        types: [ python ]