FIO-10016: csp eslint settings

[Maria-Golomb]

Link to Jira Ticket

https://formio.atlassian.net/browse/FIO-10016

Description

To proactively catch patterns that may lead to Content Security Policy (CSP) violations and improve overall application security:
Integrated eslint-plugin-security and eslint-plugin-no-unsanitized
Enabled rules to detect CSP violations and improves static code security analysis

Checklist:

• I have completed the above PR template
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (if applicable)
• My changes generate no new warnings
• My changes include tests that prove my fix is effective (or that my feature works as intended)
• New and existing unit/integration tests pass locally with my changes
• Any dependent changes have corresponding PRs that are listed above