global: improve the configuration

- Adds the rainbow_csv plugin to improve CSV file support.
- Sets mutliple filetypes for markdown plugins (`pandoc`, `markdown`).
  - `mkdnflow`.
  - `markdownpreview`.
  - `marksman` language server (but it doesn't work for pandoc
    filetype).
- Sets folding level to 1 to fold from the level 2 headings.
- Adds completion capabilities for paths.
- Adds to the pandoc filetype the markdown snippets.
- Adds a markdown template for new files created inside mkdnflow.
- Adds all useful filetypes for mkdnflow.
- Adds a keymap to fuzzy search open buffers (<leader>sb).
- Updates the English dictionnaries.
- Installs the German dictionnaires.
- Fixes the concatenation of strings for the pyenv path.

Co-Authored-by: iGor milhit <igor@milhit.ch>

init.lua

@@ -96,6 +96,7 @@ require('lazy').setup({
 
   {
     -- Autocompletion
+    --   See Configure nvim-cmp at the end of this file
     'hrsh7th/nvim-cmp',
     dependencies = {
       -- Snippet Engine & its associated nvim-cmp source
@@ -105,6 +106,9 @@ require('lazy').setup({
       -- Adds LSP completion capabilities
       'hrsh7th/cmp-nvim-lsp',
 
+      -- Adds path completion capabilities
+      'hrsh7th/cmp-path',
+
       -- Adds a number of user-friendly snippets
       'rafamadriz/friendly-snippets',
     },
@@ -272,6 +276,14 @@ vim.o.termguicolors = true
 -- Set the spelling for English, French and German.
 vim.opt.spelllang = 'en,fr,de'
 
+-- Set the folding level to 1, to allow level 2 headers to be seen.
+vim.opt.foldlevel = 1
+
+-- Set a python virtualenv as python3 provider.
+--   `vim.env.HOME` uses the neovim API to fetch the $HOME env.
+--   The `..` appends strings in lua.
+vim.g.python3_host_prog = vim.env.HOME .. '/.pyenv/versions/neovim3/bin/python'
+
 -- [[ Basic Keymaps ]]
 
 -- Keymaps for better default experience
@@ -326,6 +338,7 @@ vim.keymap.set('n', '<leader>sh', require('telescope.builtin').help_tags, { desc
 vim.keymap.set('n', '<leader>sw', require('telescope.builtin').grep_string, { desc = '[S]earch current [W]ord' })
 vim.keymap.set('n', '<leader>sg', require('telescope.builtin').live_grep, { desc = '[S]earch by [G]rep' })
 vim.keymap.set('n', '<leader>sd', require('telescope.builtin').diagnostics, { desc = '[S]earch [D]iagnostics' })
+vim.keymap.set('n', '<leader>sb', require('telescope.builtin').buffers, { desc = '[S]earch [B]uffers' })
 
 -- [[ Configure Treesitter ]]
 -- See `:help nvim-treesitter`
@@ -456,6 +469,13 @@ local servers = {
   -- rust_analyzer = {},
   -- tsserver = {},
   
+  marksman = {
+    ft = {
+      'markdown',
+      'pandoc'
+    }
+  },
+
   lua_ls = {
     Lua = {
       workspace = { checkThirdParty = false },
@@ -493,7 +513,14 @@ mason_lspconfig.setup_handlers {
 local cmp = require 'cmp'
 local luasnip = require 'luasnip'
 require('luasnip.loaders.from_vscode').lazy_load()
-luasnip.config.setup {}
+luasnip.config.setup {
+  -- Extend markdown snippets to pandoc filetype
+  --   https://github.com/L3MON4D3/LuaSnip/issues/132#issuecomment-1101710309
+  snippets = {
+    markdown = {},
+  },
+  luasnip.filetype_extend("pandoc", {"markdown"})
+}
 
 cmp.setup {
   snippet = {
@@ -533,6 +560,7 @@ cmp.setup {
   sources = {
     { name = 'nvim_lsp' },
     { name = 'luasnip' },
+    { name = 'path' },
   },
 }
 

lua/custom/plugins/markdownpreview.lua

@@ -7,7 +7,10 @@ vim.cmd([[ let g:mkdp_theme = 'light' ]])
 return {
   {
     "iamcco/markdown-preview.nvim",
-    ft = "pandoc",
+    ft = {
+      'pandoc',
+      'markdown'
+    },
     lazy = true,
     build = "cd app && yarn install",
   },

lua/custom/plugins/mkdnflow.lua

@@ -9,11 +9,44 @@ vim.keymap.set({'n','x','v'}, '<leader>tf', '<cmd>MkdnTableFormat<CR>', {desc =
 return {
   {
     "jakewvincent/mkdnflow.nvim",
-    ft = 'pandoc',
+    ft = {
+      'pandoc',
+      'markdown'
+    },
     lazy = true,
     config = function ()
       require('mkdnflow').setup({
-    })
+        filetypes = {
+          md = true,
+          rmd = true,
+          markdown = true,
+          pandoc = true
+        },
+        links = {
+          conceal = true,
+        },
+        new_file_template = {
+          use_template = true,
+          template = [[
+ ---
+ title:
+ date: {{ date }}
+ id: {{ id }}
+ tags: []
+ ---
+]],
+          placeholders = {
+            before = {
+              date = function ()
+                return os.date("%Y-%m-%dT%H:%M:%S%z")
+              end,
+              id = function ()
+                return os.date("%Y%m%d%H%M%S")
+              end
+            },
+          }
+        }
+      })
     end
   }
 }

lua/custom/plugins/rainbow-csv.lua

@@ -0,0 +1,21 @@
+-- In order to manage CSV files
+
+return {
+    'cameron-wags/rainbow_csv.nvim',
+    config = true,
+    ft = {
+        'csv',
+        'tsv',
+        'csv_semicolon',
+        'csv_whitespace',
+        'csv_pipe',
+        'rfc_csv',
+        'rfc_semicolon'
+    },
+    cmd = {
+        'RainbowDelim',
+        'RainbowDelimSimple',
+        'RainbowDelimQuoted',
+        'RainbowMultiDelim'
+    }
+}

spell/en.utf-8.add

@@ -0,0 +1,2 @@
+AoU
+Floriane