Modify Actions to use Network Wrangler 1.0

[DavidOry]

The current GitHub Actions installs the develop branch of Network Wrangler -- see here. With the release of Network Wrangler 1.0, the Project Card schema and basic functionality will move out of Network Wrangler and into the Project Card package. The code that runs the Action includes:

• Methods to read Project Cards, that can use the Project Card package rather than Network Wrangler.
• Methods that consume the Project Card details, which can also now use the Project Card package rather than Network Wrangler.

While updating the code, it would also be a good time to validate the Project Cards when they are added to the registry, using this method. The validation is broken in the current Network Wrangler, so it's not currently implemented in the registry.

cc: @lmz, @e-lo, @i-am-sijia