feat: buf highlights for current buffer fuzzy find (#732)

* feat: Add buffer highlights from treesitter

* fix: Handle not having tree sitter in some buffers

* fixup

* fixup

* fixup: move back to old node

scratch/buffer_highlights.lua

@@ -0,0 +1,24 @@
+local a = vim.api
+
+local ns = a.nvim_create_namespace("treesitter/highlighter")
+print(ns)
+local bufnr = 0
+
+-- P(a.nvim_buf_get_extmarks(bufnr, ns, 0, -1, { details = true }))
+
+local parser = vim.treesitter.get_parser(bufnr, "lua")
+local query = vim.treesitter.get_query("lua", "highlights")
+P(query)
+
+local root = parser:parse()[1]:root()
+print("root", root)
+
+local highlighter = vim.treesitter.highlighter.new(parser)
+local highlighter_query = highlighter:get_query("lua")
+
+for id, node, metadata in query:iter_captures(root, bufnr, 0, -1) do
+  local row1, col1, row2, col2 = node:range()
+  print(highlighter_query.hl_cache[id])
+  -- print(id, node, metadata, vim.treesitter.get_node_text(node, bufnr))
+  -- print(">>>>", row1, col1, row2, col2)
+end