Update README with application requirements and Spring Boot version

[devin-ai-integration]

Summary

Updates the README to improve clarity and add explicit application requirements:

• Fixed grammar in the project description
• Added specific Spring Boot version (3.3.3) to the description
• Added new "Application Requirements" section documenting Java 17+, Maven 3.6+, and MySQL 8.0+ requirements

Review & Testing Checklist for Human

• Verify the Spring Boot version (3.3.3) matches what's in pom.xml
• Confirm Java 17 is the correct minimum version requirement

Notes

Link to Devin run: https://app.devin.ai/sessions/cede678aa63e48afac3e988dea66c63c
Requested by: mason.batchelor@cognition.ai (@mbatchelor81)

[devin-ai-integration]

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