feat: Add ArrowUpward icon

[amnkarn]

Description

Add ArrowUpwardIcon to Sistent to reduce dependency on
@mui/icons-material and ensure design consistency across
Layer5 products.

Changes

• Added ArrowUpwardIcon component in src/icons/ArrowUpward/
• Exported icon via src/icons/ArrowUpward/index.ts

Related Issue

Closes #1414

Screenshots

N/A (SVG Icon)

[gemini-code-assist]

Code Review

This pull request adds the ArrowUpwardIcon component and its local index file. The review feedback recommends exporting the new icon from the central icons index for project-wide availability and provides a suggestion to correct the formatting of the local export statement.

[github-actions]

🚨 Alert! Git Police! We couldn’t help but notice that one or more of your commits is missing a sign-off. A what? A commit sign-off (your email address).

To amend the commits in this PR with your signoff using the instructions provided in the DCO check.

To configure your dev environment to automatically signoff on your commits in the future, see these instructions.

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[kishore08-07]

@amnkarn kindly sign off your commits

To add your Signed-off-by line to every commit in this branch:

1. Ensure you have a local copy of your branch by checking out the pull request locally via command line.
2. In your local branch, run: git rebase HEAD~4 --signoff
3. Force push your changes to overwrite the branch: git push --force-with-lease origin feature/amnkarn/1414