Extract source symbols and strings using https://tree-sitter.github.io/

[pombredanne]

This implies:

• Support in source-inspector Add tree-sitter plugin for symbol and string collection source-inspector#19
• Create add-on pipeline in SCIO for Treesitter source symbols Addon pipeline to collect tree-sitter symbols scancode.io#1181

[keshav-space]

The simple way to test this is to follow the below steps after installing PurlDB (https://github.com/nexB/purldb?tab=readme-ov-file#installation):

1. Go to /api/collect/ add PURL for indexing. ex: /api/collect/?purl=pkg:generic/udhcp@0.9.7&addon_pipelines=collect_tree_sitter_symbols
2. Once the indexing has completed go to /api/resources/and filter out resource based on PURL to see the symbols and strings for each resource in extra_data field. ex: /api/resources/?purl=pkg:generic/udhcp@0.9.7