Nvim: Configure plugins in after directory

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.config/nvim/after/plugin/lspsaga.rc.vim

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+lua << EOF
+local saga = require 'lspsaga'
+
+-- add your config value here
+-- default value
+-- use_saga_diagnostic_sign = true
+-- error_sign = '',
+-- warn_sign = '',
+-- hint_sign = '',
+-- infor_sign = '',
+-- dianostic_header_icon = '   ',
+-- code_action_icon = ' ',
+-- code_action_prompt = {
+--   enable = true,
+--   sign = true,
+--   sign_priority = 20,
+--   virtual_text = true,
+-- },
+-- finder_definition_icon = '  ',
+-- finder_reference_icon = '  ',
+-- max_preview_lines = 10, -- preview lines of lsp_finder and definition preview
+-- finder_action_keys = {
+--   open = 'o', vsplit = 's',split = 'i',quit = 'q',scroll_down = '<C-f>', scroll_up = '<C-b>' -- quit can be a table
+-- },
+-- code_action_keys = {
+--   quit = 'q',exec = '<CR>'
+-- },
+-- rename_action_keys = {
+--   quit = '<C-c>',exec = '<CR>'  -- quit can be a table
+-- },
+-- definition_preview_icon = '  '
+-- "single" "double" "round" "plus"
+-- border_style = "single"
+-- rename_prompt_prefix = '➤',
+-- if you don't use nvim-lspconfig you must pass your server name and
+-- the related filetypes into this table
+-- like server_filetype_map = {metals = {'sbt', 'scala'}}
+-- server_filetype_map = {}
+
+--saga.init_lsp_saga {
+--  your custom option here
+--}
+saga.init_lsp_saga()
+
+EOF