Modularize Git Operations into Core Actions

[danielgreyio]

Break down the monolithic git operations into atomic, reusable actions following the core/composite pattern.

Sub-tasks:

• Create Core Tag Operations Action
• Create Core Branch Operations Action
• Create Core Commit Operations Action
• Create Composite Release Operations Action
• Implement Testing Framework for Git Operations
• Update Documentation for New Git Operations Structure

Dependencies:

• None (can start immediately)

Priority: High