feat: show branch switching confirmation modal if changes detected

Description

Issue: [UX Polish] Only show branch switching confirma... (#109 - closed)

Use source control status to detect any changes. If there are no changes detected, the RELOAD_COMMAND_ID command will be executed instead of RELOAD_WITH_WARNING_COMMAND_ID.

Demo:

No changes detected	Changes detected
Does not show warning modal when switching to existing branch branch_no-change.mov	Show warning modal when switching to existing branch branch_change.mov
Does not show warning modal when switching to new branch new-branch_no-changes.mov	Show warning modal when switching to new branch new-branch_changes.mov