Dev task - Clean up Zowe Explorer command localization keys

[lauren-li]

Task: Clean up command localization keys in package.nls.json, particularly for view-specific strings. For example, the large majority of strings for Zowe Explorer's Data Sets view have no prefix on them, making it hard for developers to be certain what view they apply to, especially since they are mixed with commands from other views. This task would mainly involve reviewing the key names and ensuring they follow the guidance outlined in docs/developer/Menu-Commands.md.

Completing this task should improve code maintainability, and should not have any UI impact. However, when renaming localization keys, care needs to be taken to search for and update any source code that references the updated keys.

Screenshot of current package.nls.json: