Add the global and local prompts/models support

[dorbanianas]

This pull request introduces support for managing global and local prompts/models. This implementation is based on the requested feature outlined in #96.

The key features include:

1. Definition of Global and Local Prompts/Models:

   • Global Prompts/Models:
     • Created using CREATE GLOBAL PROMPT or CREATE GLOBAL MODEL.
     • Shared across different databases.
   • Local Prompts/Models:
     • Created using CREATE LOCAL PROMPT, CREATE PROMPT, or equivalent for models.
     • Default to local if no type is specified.
     • Limited to a single database.

2. State Transition Support:

   • Users can toggle a prompt/model's state between global and local using:
     • UPDATE PROMPT 'prompt_name' TO GLOBAL;
     • UPDATE PROMPT 'prompt_name' TO LOCAL;

3. Naming Constraints:

   • Prompt and model names must be unique across both global and local types, ensuring no conflicts.

4. Simplified Update and Delete Operations:

   • Operations such as UPDATE and DELETE do not require specifying the type of prompt/model (global or local).
   • If the type is specified, the system will handle it appropriately.