docs: added docs for creating new docs directories and opening a docs…

docs/onboarding-guide/create-new-docs-directories.md

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+---
+title : 'Create new docs directories'
+weight : 80
+---
+
+### Create new docs directories
+Create a new docs directory (folder) via the following steps:
+1. Identify the content bucket under which your document falls.
+2. Open the project locally in your code editor of choice and navigate to the parent folder.
+3. Right-click on the parent folder and click "new folder".
+4. Give an appropriate name to the new folder.
+5. Add the following two files to the new folder:
+    1. `index.md`: Used as the main content for a website's directory or specific webpage. It's named index because many web servers are configured to automatically look for an index file when accessing a directory. When you access a directory on a web server, if an `index.md` file is present, it will be displayed as the default page for that directory.
+    2. `_section.md`: Used for reusable components or partial content within a website's structure. It defines the page's `title` and `weight`. The title defines a human-readable title, and weight controls the order in which sections (directories) are displayed.
+6. You can edit the index page after successfully creating these pages. 
+
+```mermaid
+flowchart LR
+    A[parent Folder] --> B[new Folder] 
+    B[new Folder] --> C[index.md]
+    B[new Folder] --> D[_section.md]
+    B[new Folder] --> E[example-doc-1.md]
+    B[new Folder] --> F[example-doc-2.md]
+```

docs/onboarding-guide/open-docs-pull-request.md

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+---
+title : 'Create new docs pull request'
+weight : 90
+---
+
+## Create a new docs pull request 
+Create and submit a docs pull request (PR) via the following steps:
+
+- A Docs’ PR should solve one documentation problem. 
+- If there is no current issue for the docs task you want to accomplish, please open a docs issue before creating a PR. 
+- Use the [conventional commit style](https://github.com/asyncapi/.github/blob/master/CONTRIBUTING.md#conventional-commits) when creating PRs. Always create a docs issue or PR with the `docs:` prefix in the title. 
+- Please check your contribution and ensure it follows the AsyncAPI style guide.
+- Tag other technical writers to review your document. 
+- Tag an engineer or subject matter expert (SME) to review the technical details.
+- After implementing all the feedback you requested, please update your PR and wait for further feedback before it can be merged.