Move URI extension to indexer (#2915)

### Motivation

Move our URI extension to the indexer, so that we can get rid of `IndexablePath` and use URIs only (which is the first step to address #1908).

### Implementation

This PR just moves the extension to the indexer.

lib/ruby_indexer/ruby_indexer.rb

@@ -4,6 +4,7 @@
 require "yaml"
 require "did_you_mean"
 
+require "ruby_indexer/lib/ruby_indexer/uri"
 require "ruby_indexer/lib/ruby_indexer/indexable_path"
 require "ruby_indexer/lib/ruby_indexer/declaration_listener"
 require "ruby_indexer/lib/ruby_indexer/reference_finder"

test/requests/support/uri_test.rb → lib/ruby_indexer/test/uri_test.rb

@@ -3,7 +3,7 @@
 
 require "test_helper"
 
-module RubyLsp
+module RubyIndexer
   class URITest < Minitest::Test
     def test_from_path_on_unix
       uri = URI::Generic.from_path(path: "/some/unix/path/to/file.rb")

lib/ruby_lsp/internal.rb

@@ -26,7 +26,6 @@
 require "ruby-lsp"
 require "ruby_lsp/base_server"
 require "ruby_indexer/ruby_indexer"
-require "core_ext/uri"
 require "ruby_lsp/utils"
 require "ruby_lsp/static_docs"
 require "ruby_lsp/scope"

lib/ruby_lsp/scripts/compose_bundle.rb

@@ -5,7 +5,7 @@ def compose(raw_initialize)
   require_relative "../setup_bundler"
   require "json"
   require "uri"
-  require_relative "../../core_ext/uri"
+  require "ruby_indexer/lib/ruby_indexer/uri"
 
   initialize_request = JSON.parse(raw_initialize, symbolize_names: true)
   workspace_uri = initialize_request.dig(:params, :workspaceFolders, 0, :uri)