Replace wildcard imports with explicit imports in blessed image generator

[Copilot]

Addresses namespace pollution feedback from PR #271 review comment #271 (comment)

Changes

• tests/blessed_images/generated_blessed_images.py: Replaced from worldengine.draw import * and from worldengine.model.world import * with explicit imports of 13 drawing functions and the World class
• pyproject.toml: Removed ruff linter exception (F403, F405) that was previously masking the wildcard import issue

Example

# Before
from worldengine.draw import *
from worldengine.model.world import *

# After
from worldengine.draw import (
    draw_ancientmap_on_file,
    draw_biome_on_file,
    draw_elevation_on_file,
    # ... 10 more functions
)
from worldengine.model.world import World

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