[1.2.x] Implement programmatic retrieval of AI components

[MohamedSabthar]

Purpose

Fixes: wso2/product-ballerina-integrator#1040

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[Copilot]

Pull Request Overview

This PR implements programmatic retrieval of AI components for the flow model generator by dynamically discovering AI-related components from project dependencies instead of using static JSON files.

• Introduces AiUtils class to discover AI components (model providers, vector stores, etc.) dynamically from Ballerina project dependencies
• Updates search commands to use the new dynamic discovery approach
• Removes dependency on static JSON configuration files and migrates to runtime resolution

Reviewed Changes

Copilot reviewed 51 out of 51 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
Various test resources	Adds test fixtures with existing AI dependencies to verify dynamic discovery functionality
Search command classes	Refactors to use AiUtils instead of static JSON configurations
LocalIndexCentral.java	Removes static AI component loading methods
AiUtils.java	New utility class for dynamic AI component discovery and caching
Static JSON files	Removes hardcoded AI component configurations

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[NipunaRanasinghe]

LGTM