docs: Implement a standard Security Policy

[itsdakshjain]

We need to establish a professional security reporting workflow for our repository to handle potential vulnerabilities or project risks appropriately.

Tasks:

1. Create a SECURITY.md file in the root directory outlining our security policy.
2. Provide standard instructions on how security researchers or developers can report any vulnerabilities privately to the repository maintainer.

File Structure Impact:

is-one-one/
└── SECURITY.md <-- [NEW]