fix: go bindings

[debkanchan]

Fixes go bindings and migrates to official tree sitter go

earliest if user imported github.com/camdencheek/tree-sitter-dockerfile/bindings/go and ran go mod tidy it would throw the following:

$ go mod tidy
go: finding module for package github.com/camdencheek/tree-sitter-dockerfile/bindings/go
go: found github.com/camdencheek/tree-sitter-dockerfile/bindings/go in github.com/camdencheek/tree-sitter-dockerfile/bindings/go v0.0.0-20250112161725-971acdd90856
go: github.com/debkanchan/bark/internal/parser/languages imports
        github.com/camdencheek/tree-sitter-dockerfile/bindings/go: github.com/camdencheek/tree-sitter-dockerfile/bindings/[email protected]: parsing go.mod:
        module declares its path as: github.com/camdencheek/tree-sitter-dockerfile
                but was required as: github.com/camdencheek/tree-sitter-dockerfile/bindings/go

This is because go.mod was inside bindings instead of root. See tree-sitter-kotlin for reference.

Furthermore binding_test.go imported tree_sitter_dockerfile "github.com/camdencheek/tree-sitter-dockerfile" instead of tree_sitter_dockerfile "github.com/camdencheek/tree-sitter-dockerfile/bindings/go".

updated to official tree sitter go package because why not