Added canvas theme for tableComponent in core component

[armaang1729]

Description

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[armaang1729]

Review by claude :

Here's my assessment:

No breaking changes. The PR adds a brand-new file (_table.scss) and new SVG assets — nothing existing is modified except appending one @import line to theme.scss. All SCSS variables used ($dark-gray, $silver, $panel-bg-color, $wizard-bg-color, $very-light-gray, $focus-ring-color, $white) are defined in _variables.scss.

The only thing worth noting (non-breaking, cosmetic):

The three sort SVGs have fill="#ff13dc" (hot pink) on an opacity-0 rect — looks like a debug artifact from the SVG editor, but since opacity="0" it's invisible at runtime.
.cell-wrapper { width: 80% } at line 214 of _table.scss is a generic class name that could collide with other styles, but it's not breaking anything today.

LGTM — safe to merge.