feat: Add an API to fetch the list of core config properties

[prateek3255]

Summary of change

• Adds an API to fetch the list of core config properties

Related issues

N/A

Test Plan

N/A

Documentation changes

N/A

Checklist for important updates

• [x] Changelog has been updated
  • [ ] If there are any db schema changes, mention those changes clearly
• [ ] coreDriverInterfaceSupported.json file has been updated (if needed)
• [ ] pluginInterfaceSupported.json file has been updated (if needed)
• [ ] Changes to the version if needed
  • In build.gradle
• [ ] If added a new paid feature, edit the getPaidFeatureStats function in FeatureFlag.java file
• [x] Had installed and ran the pre-commit hook
• [ ] If there are new dependencies that have been added in build.gradle, please make sure to add them in implementationDependencies.json.
• [ ] Update function getValidFields in io/supertokens/config/CoreConfig.java if new aliases were added for any core config (similar to the access_token_signing_key_update_interval config alias).
• [x] Issue this PR against the latest non released version branch.
  • To know which one it is, run find the latest released tag (git tag) in the format vX.Y.Z, and then find the latest branch (git branch --all) whose X.Y is greater than the latest released tag.
  • If no such branch exists, then create one from the latest released branch.
• [ ] If added a foreign key constraint on app_id_to_user_id table, make sure to delete from this table when deleting the user as well if deleteUserIdMappingToo is false.

Remaining TODOs for this PR

N/A