docs: Added initial PR template with directions for doc only changes and squash merges [no ci]

.github/PULL_REQUEST_TEMPLATE/pull_request_template.md

@@ -0,0 +1,16 @@
+## Summary
+[Summarize your changes]
+
+## How would you rate the complexity of this PR? (Easy, Medium, Hard)
+[Review complexity]
+
+## Verification
+
+To verify this PR, you can:
+
+* Make sure that your PR follows the [contributing guidelines](CONTRIBUTING.md) and the [coding guidelines](https://github.com/ggerganov/llama.cpp/blob/master/README.md#coding-guidelines)
+* Test your changes using the commands in the [`tests`](tests) folder
+    * For instance, running the `./tests/test-backend-ops` command tests different backend implementations of the GGML library
+    * 
+
+* Execute [the full CI locally on your machine](ci/README.md) before publishing

CONTRIBUTING.md

@@ -0,0 +1,5 @@
+# Contributing Guidelines
+
+* If the pull request only contains documentation changes (e.g., updating
+READMEs, adding new wiki pages), please add `[no ci]` to the commit title. This will skip unnecessary CI checks and help reduce build times.
+* When squashing multiple commits on merge, use the following format for your commit title: `<module>:<commit title> (#<issue_number>)`. For example: `utils: Fix typo in utils.py (#1234)`

README.md

@@ -1088,6 +1088,7 @@ docker run --gpus all -v /path/to/models:/models local/llama.cpp:server-cuda -m
 
 - Contributors can open PRs
 - Collaborators can push to branches in the `llama.cpp` repo and merge PRs into the `master` branch
+- Collaborators should follow the [PR template](.github/PULL_REQUEST_TEMPLATE/pull_request_template.md) when adding a PR
 - Collaborators will be invited based on contributions
 - Any help with managing issues and PRs is very appreciated!
 - Make sure to read this: [Inference at the edge](https://github.com/ggerganov/llama.cpp/discussions/205)