docs: fix CONTRIBUTING claims and add the missing CODE_OF_CONDUCT

.github/workflows/test.yml

@@ -44,5 +44,5 @@ jobs:
         with:
           python-version: "3.14"
 
-      - run: pip install pytest python-dotenv
+      - run: pip install pytest
       - run: pytest tests/ -v

CODE_OF_CONDUCT.md

@@ -0,0 +1,18 @@
+# Code of Conduct
+
+This project follows the [Contributor Covenant][cc] v2.1 as its Code of
+Conduct. The short version:
+
+- Be respectful. Assume good faith.
+- Focus on what's best for the project and its users.
+- Disagree on ideas, not people.
+- No harassment, discrimination, or personal attacks.
+
+Report issues to **avicennasis@gmail.com**. Reports will be handled privately;
+retaliation against reporters is a code-of-conduct violation in itself.
+
+The full text of the Contributor Covenant is available at the link below and
+applies in its entirety to contributions, issues, PRs, and discussions
+across this organization's repositories.
+
+[cc]: https://www.contributor-covenant.org/version/2/1/code_of_conduct/

CONTRIBUTING.md

@@ -9,7 +9,7 @@ improvements are all welcome.
 git clone https://github.com/Avicennasis/AvicBotChat.git
 cd AvicBotChat
 python3 -m venv .venv && . .venv/bin/activate
-pip install ruff pytest python-dotenv
+pip install pre-commit pytest ruff==0.15.22
 pre-commit install
 ```
 
@@ -24,7 +24,7 @@ pytest tests/ -v
 ```
 
 CI runs the same `pytest tests/ -v` plus `ruff check .` and
-`ruff format --check .` against Python 3.12. Make sure both are clean
+`ruff format --check .` against Python 3.14. Make sure both are clean
 locally before opening a PR.
 
 ## Code style