[BUILD] Add top level permission restriction for GITHUB_TOKEN

[MacOS]

This PR adds the top level permission for read to restrct the GITHUB_TOKEN.

This PR makes all workflows more secure by restricting the permission of the GITHUB_TOKEN, and does remediy security alerts such as Token-Permissions, which look like

score is 0: no topLevel permission defined
Remediation tip: Visit [https://app.stepsecurity.io/secureworkflow](https://app.stepsecurity.io/secureworkflow/github.com/telekom/CityKey-Android/reuse-compliance.yml/main?enable=permissions).
Tick the 'Restrict permissions for GITHUB_TOKEN'
Untick other options
NOTE: If you want to resolve multiple issues at once, you can visit https://app.stepsecurity.io/securerepo instead.
Click Remediation section below for further remediation help

[MacOS]

@BhaskarNS-iOS and @ShashilPohankar - please review my PR.

[Copilot]

Pull Request Overview

This PR enhances security by restricting the GITHUB_TOKEN permissions to read access across multiple GitHub Actions workflows.

• Adds an explicit top-level permissions block setting 'contents: read' for the token.
• Replaces a broader 'read-all' permission with a scoped 'contents: read' in the openssf-scorecard workflow.

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 4 comments.

File	Description
.github/workflows/reuse-compliance.yml	Added top-level 'permissions: contents: read' block to restrict the token.
.github/workflows/oss-review-toolkit.yml	Added top-level 'permissions: contents: read' block to restrict the token.
.github/workflows/openssf-scorecard.yml	Replaced 'read-all' with 'permissions: contents: read' to scope the permission.
.github/workflows/continuous-integration.yml	Added top-level 'permissions: contents: read' block to restrict the token.

[Copilot]

[nitpick] Consider removing redundant blank lines after the permissions block to improve readability.

Suggested change

[Copilot]

[nitpick] Consider removing redundant blank lines following the permissions block for consistent formatting.

Suggested change

	permissions:
	contents: read
	jobs:
	oss-review-toolkit:
	permissions:
	contents: read
	jobs:
	oss-review-toolkit:

[Copilot]

[nitpick] Consider removing redundant blank lines after the permissions block to maintain consistent formatting across workflow files.

Suggested change

[Copilot]

[nitpick] Consider removing redundant blank lines following the permissions block to maintain consistent formatting.

Suggested change

	permissions:
	contents: read
	jobs:
	swift-lint:
	permissions:
	contents: read
	jobs:
	swift-lint: