chore(administration): add PR template (#1102)

* chore(administration): add PR template

* add section for dd-rust-license-tool

* update changelog comments

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,70 @@
+<!--
+  Your PR title must conform to the conventional commit spec:
+  https://www.conventionalcommits.org/en/v1.0.0/
+
+  <type>(<scope>)!: <description>
+
+  * `type` = chore, enhancement, feat, fix, docs, revert
+  * `!` = OPTIONAL: signals a breaking change
+  * `scope` = Optional when `type` is "chore" or "docs"
+  * `description` = short description of the change
+
+Examples:
+
+  * enhancement(file source): Add `sort` option to sort discovered files
+  * feat(new source): Initial `statsd` source
+  * fix(file source): Fix a bug discovering new files
+  * chore(external docs): Clarify `batch_size` option
+-->
+
+## Summary
+
+<!-- Please provide a brief summary about what this PR does.
+This should help the reviewers give feedback faster and with higher quality. -->
+
+## Change Type
+
+- [ ] Bug fix
+- [ ] New feature
+- [ ] Non-functional (chore, refactoring, docs)
+- [ ] Performance
+
+## Is this a breaking change?
+
+- [ ] Yes
+- [ ] No
+
+## How did you test this PR?
+
+<!-- Please describe your testing plan here.
+Providing this information upfront will facilitate a smoother review process. -->
+
+## Does this PR include user facing changes?
+
+- [ ] Yes. Please add a changelog fragment based on
+  our [guidelines](https://github.com/vectordotdev/vector/blob/master/changelog.d/README.md).
+- [ ] No. A maintainer will apply the "no-changelog" label to this PR.
+
+## Checklist
+
+- [ ] Our [CONTRIBUTING.md](https://github.com/vectordotdev/vrl/blob/main/CONTRIBUTING.md) is a good starting place.
+- [ ] If this PR introduces changes to [LICENSE-3rdparty.csv](https://github.com/vectordotdev/vrl/blob/main/LICENSE-3rdparty.csv), please
+  run `dd-rust-license-tool write` and commit the changes. More details [here](https://crates.io/crates/dd-rust-license-tool).
+- [ ] For new VRL functions, please also create a sibling PR in Vector to document the new function.
+
+<!-- Examples for the above:
+  PR adding new VRL function: https://github.com/vectordotdev/vrl/pull/993
+  PR adding documentation: https://github.com/vectordotdev/vector/pull/21142
+  
+  We are working towards improving this workflow.
+-->
+
+## References
+
+<!-- Please list any issues closed by this PR. -->
+
+<!--
+- Closes: <issue link>
+-->
+
+<!-- Any other issues or PRs relevant to this PR? Feel free to list them here. -->

CONTRIBUTING.md

@@ -5,11 +5,9 @@ provide everything you need to get started.
 
 ## Steps
 
-1. Ensure your change has an issue! Find an
-   [existing issue][urls.existing_issues] or [open a new issue][urls.new_issue].
-  - This is where you can get a feel if the change will be accepted or not.
-    Changes that are questionable will have a `needs: approval` label.
-2. [fork the Vector repository][urls.fork_repo] in your own
+1. Ensure your change has an issue!
+   Find an [existing issue][urls.existing_issues] or [open a new issue][urls.new_issue].
+2. [fork the VRL repository][urls.fork_repo] in your own
    GitHub account (only applicable to outside contributors).
 3. [Create a new Git branch][urls.create_branch].
 4. Make your changes.