Add macOS-Specific Instructions to Documentation for Consistency

[ashanhr]

Description: Some documentation pages lack macOS-specific instructions. While Linux instructions can often be followed on macOS, providing explicit macOS-specific instructions will ensure consistency and clarity in the documentation.

Examples include:

• https://apim.docs.wso2.com/en/latest/get-started/api-manager-quick-start-guide/
• https://apim.docs.wso2.com/en/latest/get-started/streaming-quick-start-guide/

Suggested Labels: type/docs

Affected Product Version: 4.3.0