fix: revert to go1.21

fix: linear setup

chore: upgrade golangci-lint and added linters

feat(19): add support for custom pr template path (#21)

Closes #19.

## Description

* deprecation: retire .ignore_pull_request_template variable
* feat: add .pull_request_template_path to customize the template path
* enhancement: support finding the pr template and .gh-prx.yaml paths
from nested repo directories

## PR Checklist

- [x] Documentation is changed or added

fix: loading setup cfg

feat: ai summarizer to work based on existing template

feat(14): dynamic filling of missing variables for pr title (#15)

feat: add support for dynamic filling of missing vars for pr title

feat(12): add support for linear.app (#13)

Closes #12.

* feat: add support for linear app
* chore: upgrade go to 1.21

feat(10): choose issue from list in checkout new (#11)

## Description

1. New feature added to prompt the user to choose an issue for the list
in "checkout-new" file.

## PR Checklist

- [x] Documentation is changed or added

chore: update deps (#9)

* Updated dependencies in the project

fix: pr template loading

feat: support global config