Clarify license and terms for contributions, reformat markdown (#448)

## Summary
Tweaks several of our files to more clearly explain under what terms we
accept contributions.
Reformat markdown files to fit under an 80 character width.

## How was it tested?
N/A

## Community Contribution License
All community contributions in this pull request are licensed to the
project maintainers
under the terms of the [Apache 2
license](https://www.apache.org/licenses/LICENSE-2.0).
By creating this pull request I represent that I have the right to
license the
contributions to the project maintainers under the Apache 2 license.


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

- **Documentation**
- Refined contribution guidelines by replacing legacy certification
language with updated Apache 2 License and Community Contribution
License terms.
- Enhanced readability and consistency across documentation by adjusting
formatting, capitalization, and layout in contribution guidelines, code
of conduct, and project descriptions.
- Improved presentation of reporting instructions and introductory
content for clearer communication.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Author: loreto

CONTRIBUTING.md

@@ -1,25 +1,19 @@
 # Contributing
 
-When contributing to this repository, please describe the change you wish to make via a related issue, or a pull request.
+When contributing to this repository, please describe the change you wish to
+make via a related issue, or a pull request.
 
-Please note we have a [code of conduct](CODE_OF_CONDUCT.md), please follow it in all your interactions with the project.
+Please note we have a [code of conduct](CODE_OF_CONDUCT.md), please follow it in
+all your interactions with the project.
 
 ## Opening a Pull Request
 
-This project is published as a standalone repo from our [opensource monorepo](https://github.com/jetify-com/opensource).
-Pull requests should be sent to the monorepo instead, and they will automatically be published
+This project is published as a standalone repo from our
+[opensource monorepo](https://github.com/jetify-com/opensource). Pull requests
+should be sent to the monorepo instead, and they will automatically be published
 to this repo when merged.
 
-## Developer Certificate of Origin
-
-By contributing to this project you agree to the [Developer Certificate of Origin](https://developercertificate.org/) (DCO) which was created by the Linux Foundation and is a simple statement that you, as a contributor, have the legal right to make the contribution. See the DCO description for details below:
-
-> By making a contribution to this project, I certify that:
->
-> a. The contribution was created in whole or in part by me and I have the right to submit it under the open source license indicated in the file; or
->
-> b. The contribution is based upon previous work that, to the best of my knowledge, is covered under an appropriate open source license and I have the right under that license to submit that work with modifications, whether created in whole or in part by me, under the same open source license (unless I am permitted to submit under a different license), as indicated in the file; or
->
-> c. The contribution was provided directly to me by some other person who certified (a), (b) or (c) and I have not modified it.
->
-> d. I understand and agree that this project and the contribution are public and that a record of the contribution (including all personal information I submit with it, including my sign-off) is maintained indefinitely and may be redistributed consistent with this project or the open source license(s) involved.
+Contributions made to this project must be made under the terms of the
+[Apache 2 License](https://www.apache.org/licenses/LICENSE-2.0).
+By contributing to this project you agree to the terms stated in the
+[Community Contribution License](https://github.com/jetify-com/opensource/blob/main/CONTRIBUTING.md#community-contribution-license).