Add database, telegram bot, and tests skills; update stack and fastapi skills

- Add python-development-database skill: metaorm patterns for tables, repositories, filters, settings, transactions, pagination, and exceptions
- Add python-development-telegram-bot skill: aiogram bot service with polling/webhook, router structure, middlewares, inline keyboards, and pagination
- Add python-development-tests skill: test organization guidelines with pytest, fixtures, and dependency injection rules
- Update python-development-stack: replace SQLModel/SQLAlchemy with metaorm; add pytest, pytest-asyncio, pytest-cov, faker
- Update python-development-fastapi: add sections for dependencies and list endpoints with ListResponse schema
- Update python-development-code-style: allow ctx as exception for typer.Context parameter
- Update python-development index with links to all three new skills

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

skills/python-development-code-style/SKILL.md

@@ -54,3 +54,4 @@ description: Code conventions, typing, testing habits, and engineering principle
 - Do not use `from __future__ import annotations`. Use explicit forward-reference strings (e.g. `"MyClass"`) when necessary.
 - Do not use `if TYPE_CHECKING:` blocks. Import the types you need at the top level. Deferred imports inside `TYPE_CHECKING` hide dependencies and break runtime introspection.
 - Do not abbreviate variable or parameter names. Write them out in full so the intent is obvious without context. Examples of forbidden abbreviations: `idx` (use `index`), `dep` (use `dependency`), `cfg` (use `config` or `configuration`), `msg` (use `message`), `err` (use `error`), `resp` (use `response`). The same rule applies to class attributes, function parameters, and local variables.
+- Exception: when implementing Typer commands, the parameter name `ctx` is allowed for the `typer.Context` object because it is the idiomatic name required by the framework.