Media Library functionality in the block editor causes CSP 'unsafe-eval' error

[snehapatil2001]

Trac ticket: https://core.trac.wordpress.org/ticket/62894

Description

This PR fixes issue #62894 where the Media Library functionality in the block editor triggers Content Security Policy (CSP) 'unsafe-eval' errors. The fix replaces dynamic template evaluation with direct DOM manipulation in the Frame view implementation.

Changes proposed in this Pull Request:

• Removes usage of _.template which requires unsafe-eval
• Adds new createElement helper method for safe DOM creation
• Implements createFrameTemplate method using native DOM APIs
• Updates render method to use safe DOM manipulation
• Maintains all existing Frame view functionality

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This Pull Request is for code review only. Please keep all other discussion in the Trac ticket. Do not merge this Pull Request. See GitHub Pull Requests for Code Review in the Core Handbook for more details.

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