add comment bot for PR checklist (#6149)

* add comment bot and remove checklist from pr template

* give the bot some speech

* Update .github/PULL_REQUEST_TEMPLATE.md

Co-authored-by: Alexander Bezobchuk <alexanderbez@users.noreply.github.com>

.github/PULL_REQUEST_TEMPLATE.md

@@ -4,31 +4,11 @@ v    Before smashing the submit button please review the checkboxes.
 v    If a checkbox is n/a - please still include it but + a little note why
 ☺ > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > >  -->
 
-Closes: #XXX
-
 ## Description
 
 <!-- Add a description of the changes that this PR introduces and the files that
 are the most critical to review.
 -->
 
-______
 
-For contributor use:
-
-- [ ] Targeted PR against correct branch (see [CONTRIBUTING.md](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#pr-targeting))
-- [ ] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
-- [ ] Code follows the [module structure standards](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules/structure.md).
-- [ ] Wrote unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#testing)
-- [ ] Updated relevant documentation (`docs/`) or specification (`x/<module>/spec/`)
-- [ ] Added  relevant `godoc` [comments](https://blog.golang.org/godoc-documenting-go-code).
-- [ ] Added a relevant changelog entry to the `Unreleased` section in `CHANGELOG.md`
-- [ ] Re-reviewed `Files changed` in the Github PR explorer
-
-______
-
-For admin use:
-
-- [ ] Added appropriate labels to PR (ex. `WIP`, `R4R`, `docs`, etc)
-- [ ] Reviewers assigned
-- [ ] Squashed all commits, uses message "Merge pull request #XYZ: [title]" ([coding standards](https://github.com/tendermint/coding/blob/master/README.md#merging-a-pr))
+closes: #XXXX

.github/auto-comment.yml

@@ -0,0 +1,30 @@
+pullRequestOpened: |
+  :wave: Thanks for creating a PR!   
+
+  Before we can merge this PR, please make sure that all the following items have been 
+  checked off. If any of the checklist items are not applicable, please leave them but
+  write a little note why.   
+
+  ______
+
+  For contributor use:
+
+  - [ ] Targeted PR against correct branch (see [CONTRIBUTING.md](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#pr-targeting))
+  - [ ] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
+  - [ ] Code follows the [module structure standards](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules/structure.md).
+  - [ ] Wrote unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#testing)
+  - [ ] Updated relevant documentation (`docs/`) or specification (`x/<module>/spec/`)
+  - [ ] Added  relevant `godoc` [comments](https://blog.golang.org/godoc-documenting-go-code).
+  - [ ] Added a relevant changelog entry to the `Unreleased` section in `CHANGELOG.md`
+  - [ ] Re-reviewed `Files changed` in the Github PR explorer
+
+  ______
+
+  For admin use:
+
+  - [ ] Added appropriate labels to PR (ex. `WIP`, `R4R`, `docs`, etc)
+  - [ ] Reviewers assigned
+  - [ ] Squashed all commits, uses message "Merge pull request #XYZ: [title]" ([coding standards](https://github.com/tendermint/coding/blob/master/README.md#merging-a-pr))
+
+
+  Thank you for your contribution to the Cosmos-SDK! :rocket: