PSVAMB-31297 support widget ID (wid parameter) in iframe & auto embed codes

[muli]

JIRA ticket: https://kaltura.atlassian.net/browse/PSVAMB-31297.

Main change

Updated the handlebars templates for auto & iframe embed codes to support the wid parameter (widget ID) for iframe & auto embed.

Additional changes

• Added node_modules to .gitignore to avoid committing dependencies to the repo
• Removed node_modules directory (hence the big amount of files that were deleted)
• Upgraded dependencies
• Updated readme

[muli]

@OrenMe, can you please take a look?

[OrenMe]

@muli you need player team for this, @giladna fyi
One comment - you added thousands of LOC and removed 100s of thousands LOC but not a single comment for a reviewer to be able to give you any honest review.suggest you to add comments explaining what was done and what is the incentive so a reviewer may be able to give you a proper feedback.

[muli]

@OrenMe, thanks! You're totally right, I just added a description to the PR.
@giladna, I'd appreciate your review.