Ensure Copyright headers are present before imports in all source files

[sridmad]

Bug Description

Some source files in the repository have missing or misplaced copyright headers. In a few cases, the copyright comment block appears below import statements instead of at the very top of the file. This causes compliance and legal visibility issues.

Reproduction Steps

• Open various TypeScript, JavaScript, or other code files in the repo.
• Observe that in some files, the copyright header appears after one or more import statements (or is missing altogether).
• Files should have the copyright header as the first top-level item, preceding any import statements.

Expected Behavior

• Every .ts, .js, and relevant source file should have the copyright header (e.g., // Copyright (c) Microsoft Corporation. All rights reserved.) as the very first lines in the file.
• No import (or require) statement should come before the header.

Impact

• Affects license compliance and appropriate attribution in downstream/redistributed code.