Add a dev build script for @wso2is/theme

[brionmario]

Purpose

$subject to generate a theme build witout hashing.

Usage

From the Console.

npx lerna run build:dev --stream --scope @wso2is/theme

Index index.html

<!-- Remove `<%= htmlWebpackPlugin.options.themeHash %>` -->
<link href="<%= htmlWebpackPlugin.options.publicPath %>/libs/themes/default/theme.min.css" rel="stylesheet" type="text/css"/>

Related Issues

• None

Checklist

• e2e cypress tests locally verified.
• Manual test round performed and verified.
• UX/UI review done on final implementation.
• Documentation provided. (Add links if there's any)
• Unit tests provided. (Add links if there's any)
• Integration tests provided. (Add links if there's any)

Related PRs

• None

Security checks

• Followed secure coding standards in http://wso2.com/technical-reports/wso2-secure-engineering-guidelines?
• Ran FindSecurityBugs plugin and verified report?
• Confirmed that this PR doesn't commit any keys, passwords, tokens, usernames, or other secrets?