Add GitHub Copilot Instructions and Setup Steps (#4884)

.github/copilot-instructions.md

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+This is a python project which is a wrapper for the Telegram Bot API. Please read the contributing
+guidelines mentioned in .github/CONTRIBUTING.rst to know how to contribute to this project. The 
+README.rst file lists the features and usage of the project.
+
+### Development Environment:
+
+Your development environment is set up using `uv`, a tool for managing Python environments and dependencies.
+Your environment has all extra dependencies and groups installed, on Python 3.13. Please continue using `uv` for managing your development environment,
+and for any scripts or tools you need to run.
+
+Some example commands on `uv`:
+- `uv sync --all-extras --all-groups` to install all dependencies and groups required by the project.
+- `uv run -p 3.14 --all-groups --all-extras tests/` to run tests on a specific Python version. Please use the `-p` flag often.
+- `uv pip install <package>` to install a package in the current environment.
+
+If uv is somehow not available, you can install it using `pip install uv`.
+
+### Repository Structure:
+
+The repository follows a standard structure for Python projects. Here are some key directories and files:
+
+- `src/`: This directory contains the main source code for the project.
+- `tests/`: This directory contains test cases for the project.
+- `pyproject.toml`: This file contains the project metadata and dependencies.
+- `.github/`: This directory contains GitHub-specific files, including workflows and issue templates.
+
+
+### Things to keep in mind while coding:
+
+- Ensure that your code is properly and fully typed. All your code should be compatible from
+  Python 3.9 to 3.14. Don't use the `typing_extensions` module.
+- Read the stability guide mentioned at docs/source/stability_policy.rst to understand if your changes
+  are breaking or incompatible.
+- Try to make sure your code is asyncio-friendly and thread-safe.
+- Run `uv run pre-commit` to run pre-commit hooks before committing your changes, but after `git add`ing them.
+- Make sure you always test your changes. Either update or write new tests in the `tests/` directory.
+
+### Pull Requests:
+
+When you create a pull request, please also add the appropriate labels to it.

.github/workflows/copilot-setup-steps.yml

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+# This file is for the copilot agent on Github. This helps to set up the development environment
+# See the docs here: https://docs.github.com/en/enterprise-cloud@latest/copilot/how-tos/use-copilot-agents/coding-agent/customize-the-agent-environment#preinstalling-tools-or-dependencies-in-copilots-environment
+name: "Copilot Setup Steps"
+
+# Automatically run the setup steps when they are changed to allow for easy validation, and
+# allow manual testing through the repository's "Actions" tab
+on:
+  workflow_dispatch:
+  pull_request:
+    paths:
+      - .github/workflows/copilot-setup-steps.yml
+
+jobs:
+  # The job MUST be called `copilot-setup-steps` or it will not be picked up by Copilot.
+  copilot-setup-steps:
+    runs-on: ubuntu-latest
+
+    # Set the permissions to the lowest permissions possible needed for your steps.
+    # Copilot will be given its own token for its operations.
+    permissions:
+      # If you want to clone the repository as part of your setup steps, for example to install dependencies, you'll need the `contents: read` permission. If you don't clone the repository in your setup steps, Copilot will do this for you automatically after the steps complete.
+      contents: read
+      pull-requests: write  # So copilot can add labels to the PR
+
+    # You can define any steps you want, and they will run before the agent starts.
+    # If you do not check out your code, Copilot will do this for you.
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          persist-credentials: false
+
+      - name: Install uv
+        uses: astral-sh/setup-uv@e92bafb6253dcd438e0484186d7669ea7a8ca1cc
+        with:
+          # Install a specific version of uv.
+          version: "0.8.3"
+          # Install 3.13:
+          python-version: 3.13
+
+      - name: Install the project
+        run: uv sync --all-extras --all-groups
+    
+      - name: Install linting dependencies
+        # Make sure the pinned versions here match the ones in .pre-commit-config.yaml
+        run: uv pip install black==25.1.0 isort==6.0.1 mypy==1.16.1 flake8==7.3.0 ruff==0.12.2

changes/unreleased/4884.ADcdCj6GrMaKffYSLzWdsL.toml

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+internal = "Add Copilot Instructions and Setup Steps"
+[[pull_requests]]
+uid = "4884"
+author_uid = "harshil21"
+closes_threads = []