add helix config

config/helix/.config/helix/config.toml

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+# https://docs.helix-editor.com/
+# https://github.com/helix-editor/helix/wiki
+
+theme = "github_dark"
+
+[editor]
+true-color = true
+mouse = true
+bufferline = "multiple"
+
+[keys.normal]
+G = "goto_file_end"
+X = "extend_line_above"
+esc = ["collapse_selection", "keep_primary_selection"]
+
+[keys.normal.space]
+q = ":quit"
+w = ":write"
+l = ":config-reload"
+
+# [editor.cursor-shape]
+# insert = "bar"
+# normal = "block"
+# select = "underline"
+
+[editor.file-picker]
+hidden = false
+
+[editor.lsp]
+display-messages = true

config/helix/.config/helix/languages.toml

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+[[language]]
+name = "rust"
+auto-format = true