Add documentation for pre-commit hook

Signed-off-by: Priyanshi Gaur <[email protected]>

.pre-commit-config.yaml

@@ -36,7 +36,6 @@ repos:
         - --fix=no
       - id: trailing-whitespace
 
-repos:
   - repo: local
     hooks:
       - id: black
@@ -55,4 +54,4 @@ repos:
         name: "isort"
         entry: isort --filter-files
         language: system
-        types: ["file", "python", "text"]
+        types: ["file", "python", "text"]

README.md

@@ -76,6 +76,26 @@ follow these steps:
 
 ### Static analysis
 
+#### Using [`pre-commit`][pre-commit]
+1. Install pre-commit
+
+- Using pip:
+  ```shell
+  pip install pre-commit
+  ```
+- Using homebrew:
+  ```shell
+  brew install pre-commit
+  ```
+
+2. Install the git hook scripts
+   ```shell
+   pre-commit install
+   ```
+
+It will run on every commit automatically.
+
+#### Using [`dev/tools.sh`][tools-sh] helper script
 The [`dev/tools.sh`][tools-sh] helper script runs the static analysis tools
 (`black`, `flake8`, and `isort`):
 ```shell
@@ -89,6 +109,7 @@ directories to check:
 ```
 
 [tools-sh]: /dev/tools.sh
+[pre-commit]: https://pre-commit.com/
 
 
 ### Resources
@@ -100,12 +121,14 @@ directories to check:
 - [isort][isort]: _A Python utility / library to sort imports_
   - (It doesn't import any libraries, it only sorts and formats them.)
 - [ppypa/pipenv][pipenv]: _Python Development Workflow for Humans._
+- [pre-commit][pre-commit]: A framework for managing and maintaining multi-language pre-commit hooks.
 
 [ccospyguide]: https://opensource.creativecommons.org/contributing-code/python-guidelines/
 [black]: https://github.com/psf/black
 [flake8]: https://gitlab.com/pycqa/flake8
 [isort]: https://pycqa.github.io/isort/
 [pipenv]: https://github.com/pypa/pipenv
+[pre-commit]: https://pre-commit.com/
 
 
 ### GitHub Actions
@@ -115,7 +138,7 @@ GitHub Actions workflow performs static analysis (`black`, `flake8`, and
 `isort`) on committed changes. The workflow is triggered automatically when you
 push changes to the main branch or open a pull request.
 
-[workflow-static-analysis]: .github/workflows/python_static_analysis.yml
+[workflow-static-analysis]: .github/workflows/static_analysis.yml
 
 
 ## Data sources