[New Feature]: Integrate client generator tools with "bal tools" command

[NipunaRanasinghe]

Description

As per the current CLI tool implementation, all the Ballerina CLI tools are shipped with the Ballerina distribution itself.
But with the new bal tool command support, the CLI tools (especially the client generator tools like, openAPI, graphQL, gRPC) can be decoupled from the distribution releases, to be pulled from the Ballerina central on-demand.
With this support the tools will have independent release cycles, which will also speed up shipping tooling improvements and fixes.

As the first milestone, the following tools will be integrated with the bal tool command.

• OpenAPI tool - Add bal tool support for openAPI CLI ballerina-library#5131
• GraphQL tool
• gRPC tool
• AsyncAPI tool

Related area

-> Other Area

Related issue(s) (optional)

#40264