fix cmp and codecompanion

- remove blink dependency
- set up telescope as default provider for codecompanion slash commands

lua/extensions/telescope.lua

@@ -0,0 +1,8 @@
+local ts = require("telescope")
+ts.load_extension("fzf")
+ts.load_extension("glyph")
+ts.load_extension("color_names")
+-- ts.load_extension("notify")
+ts.load_extension("cmdline")
+ts.load_extension("file_browser")
+ts.load_extension("codecompanion")