fix: Deterministic sort list in output to avoid random order

[tonur]

Solves one part of this issue:

• [BUG] dyff between command is non deterministic and uses 2 different styles randomly #525

With some additional features added to solve machine readable feature request in this PR:

• feat: Add simple output to allow consitent machine readable output #531

YAML comparison to avoid non-deterministic random output:

• The getNonStandardIdentifierFromNamedLists function in pkg/dyff/core.go now sorts keys before iterating, ensuring deterministic order when comparing named lists. This prevents inconsistent results due to map iteration order.

Test fixture updates:

• The test fixture files assets/issues/issue-525/from.yaml and assets/issues/issue-525/to.yaml have been updated with new and modified entries, reflecting changes in image tags, digests, and additional images for more comprehensive testing. [1] [2]

Output formatting:

• The generateHumanDetailOutputAddition method in pkg/dyff/output_human.go now uses the report's configured indent value instead of a hardcoded value, ensuring consistent output formatting.

Example that this is deterministic:
One sample:

Many samples:

[tonur]

I don't know if this is a fix or a feat.
I will use fix in the PR title, but please tell me to change it if you disagree.

[tonur]

Any chance that this could get a review?