feat: brew formulas

[deicon]

feat: Homebrew formula generation and CI integration

Description:
This PR introduces a new script to automatically generate Homebrew formulas for `httprunner` and `harparser` on release. It also integrates this script into the CI workflow to keep the formulas up-to-date.

Motivation:
Manually updating the Homebrew formulas for each release is tedious and error-prone. This change automates the process, ensuring that users can easily install the latest versions of `httprunner` and `harparser` via Homebrew.

What was changed:
- Added a new script `.github/scripts/generate_formula.sh` that generates the Homebrew formulas for `httprunner` and `harparser` based on the release tag.
- Modified `.github/workflows/ci.yml` to:
    - Package archives with the tool name, tag, OS, and architecture.
    - Call the `generate_formula.sh` script on release.
    - Commit and push the updated formulas to the repository.
- Added new Formula files `Formula/harparser.rb` and `Formula/httprunner.rb` which are used as templates and updated by the script
- Modified the Makefile to correctly name the `harparser` output file.
- Updated the README to include installation instructions via Homebrew

Tests:
No new tests were added. The existing test in the generated Homebrew formula is used to verify the installation.

**Warning:** The generated Homebrew formulas currently contain placeholder values for the URL and SHA256 checksums. These values are updated by the CI workflow on release. Local testing of the script will not produce valid formulas without setting the correct environment variables and having the built binaries available.