chore: adding CONTRIBUTING for integrations and removing DS_Store (#231)

Co-authored-by: josh <[email protected]>

integrations/CONTRIBUTING.md

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+# Contributing
+
+Contributions to integrations are welcome 😊 the integrations repo is the place where you can share how you've integrated uAgents with other technology.
+
+## A few simple rules
+
+- Search the repo for the integration you're submitting, just in case.
+
+- run [black](https://pypi.org/project/black/) on your code before submitting.
+
+- Include a `project.json` file, example of:
+
+```js
+{
+    "title": "Bert Base Uncased",
+    "description": "BERT base model (uncased) Pretrained model on English language using a masked language modeling (MLM) objective.",
+    "categories":    ["Text Classification", "Hugging Face", "Text Generation"], 
+    "deltav": false
+}
+```
+
+Set deltav to true if your agent is built using agentverse and is accessible by DeltaV.
+
+## Commits and PRs
+
+This project uses Conventional Commits to generate release notes and to determine versioning. Commit messages should adhere to this standard and be of the form:
+
+You will need to fork uAgents and then clone the repo to make PRs to this project. Please be descriptive in your commits:
+
+```bash
+git commit -m "feat: add new feature x"
+git commit -m "fix: fix bug in feature x"
+git commit -m "docs: add documentation for feature x"
+git commit -m "test: add test suite for feature x"
+```
+
+Further details on `conventional commits` can be found here: <https://www.conventionalcommits.org/en/v1.0.0/>
+
+
+## Support and help
+
+Suppport and extra information is available in our [documentation](https://fetch.ai/docs) and on [Discord](https://discord.com/invite/fetchai)