Ramsess/add casing check to metadata

[ramsessanchez]

Adds a check to our schema syncs so casing changes in entityTypes, complexTypes, and enumTypes are flagged. The following is achieved by:

• Add script to create json files containing maps for entityTypes, complexTypes, and enumTypes for both v1.0 and beta.
• Add a second script to compare the casing of type names in the schema csdl files to what is stored in the json maps.
• An error is thrown if a type exists in the json map and the csdl with different casing; new types and deleted types are not flagged.
• Adds a github action that runs on pull requests making changes to the schema csdl files. This would target the pr's created by our generation pipeline. Will flag changes to casing changes as breaking.
• If a pr is approved and merged then the action runs the mapping script again to set a new baseline for what is contained in our csdl files.

Source of issue described here: microsoft/kiota#7654