feat: support to selection/exclusion files by extension

[danielebriggi]

No description provided.

[Copilot]

Pull Request Overview

This PR adds support for filtering files by extension during the SQLite RAG database creation process. The primary purpose is to provide granular control over which file types are included or excluded when processing source files.

• Added only_extensions and exclude_extensions input parameters to the action configuration
• Updated the SQLite RAG command to use the new extension filtering options
• Enhanced the search functionality with improved result processing and URL construction

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
action.yaml	Added extension filtering parameters and updated the sqlite-rag command to use them
search_edge_function_template/aisearch-docs.js	Enhanced search functionality with configurable result limits and improved result processing
.github/workflows/test.yaml	Updated test configuration to use the new extension filtering feature

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