[Dependencies] Add missing colorlog and PyYAML to requirements.txt

[AswaniSahoo]

Problem

The root requirements.txt is missing two packages that are imported unconditionally in core/common/:

Package	Import Location	Import Statement
colorlog	core/common/log.py (line 18)	import colorlog
PyYAML	core/common/utils.py (line 24)	import yaml

Both imports are at module level with no try/except guard. Following the install guide, a user runs pip install -r requirements.txt and then pip install -e .. Since colorlog and PyYAML are absent from requirements.txt, any subsequent ianvs CLI invocation crashes with ModuleNotFoundError unless the user happens to have these packages installed from another source.

Additional Cleanup

The existing entries in requirements.txt were unsorted. This change also alphabetically sorts all entries for consistency and easier maintenance.

Changes

• Add colorlog to requirements.txt
• Add PyYAML to requirements.txt
• Sort entries alphabetically