docs: add onboarding ambassadors guide

onboarding_asyncapi_ambassador.md

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+# Onboarding Guide for AsyncAPI Ambassadors
+Welcome to the AsyncAPI Ambassador Program! 
+
+We are happy you chose to join the ambassador program in making valuable contributions to promote AsyncAPI.
+
+Your tenure as an ambassador begins on the date you are accepted. For example, if you were accepted as an ambassador on January 11, 2025, your tenure would end on January 10, 2026. At the end of your tenure, we will review your performance to determine if you can continue as an ambassador.
+
+
+As an ambassador, you are expected to make a minimum of four contributions per year. Contributions can include articles, talks, videos, podcasts, driving initiatives, and more.
+
+- Articles, videos, and podcasts can be published on the AsyncAPI blog or other platforms.
+- Talks and presentations should focus primarily on AsyncAPI.
+- Contributions to improve the visibility of the community.
+- Volunteering at booths during events.
+
+
+Examples:
+- If you publish three articles and propel one initiative about AsyncAPI in eight months, you will become an ambassador for the whole year.
+- If you make one presentation, write two articles, and propel one initiative about AsyncAPI, you will become an ambassador for the whole year.
+
+
+
+### Ambassador duties
+- Be in tune with AsyncAPI's mission and values.
+- Always respect the [code of conduct](https://github.com/asyncapi/.github/blob/master/CODE_OF_CONDUCT.md).
+- Be active in your role as an ambassador.
+
+### Ambassador benefits
+- Invitation to [AsyncAPI Initiative organization](https://github.com/orgs/asyncapi/people).
+- A special swag pack for Ambassadors (valued at approximately $150, including shipping).
+- Swag for conference or workshop participants (valued at approximately $70, including shipping).
+- Free entry to AsyncAPI conferences.
+- Community-wide recognition.
+- Our sincere gratitude and respect for your contributions!
+