[ATOMIC] Create SRS Template

## Task
Create Software Requirements Specification template at `docs/templates/SRS_TEMPLATE.md`

**Conductor:** TORCH | **Priority:** 2 | **Duration:** 20 min

## Sections Required
- Introduction (Purpose, Scope, Definitions)
- Overall Description
- Functional Requirements
- Non-Functional Requirements
- Interface Requirements

## Output
`docs/templates/SRS_TEMPLATE.md`