Improved rust, keybindings, org-mode export to HTML

Rust

- added ftplugin/after/rust.lua for rust keybindings

keybindings

- <space>[ and <space>] to goto prev and next diagnosticsw

Org mode

- added option for HTML export with pandoc

lua/plugins.lua

@@ -88,6 +88,25 @@ require("lazy").setup({
         org_agenda_files = '~/orgfiles/**/*',
         org_default_notes_file = '~/orgfiles/refile.org',
         org_todo_keywords = { 'TODO(t)', 'STARTED(s)', 'PLANNED(p)', '|', 'DONE(d)', 'UNPLANNED(u)' },
+        org_custom_exports = {
+          f = {
+            label = 'Export to HTML format',
+            action = function(exporter)
+              local current_file = vim.api.nvim_buf_get_name(0)
+              local target = vim.fn.fnamemodify(current_file, ':p:r') .. '.html'
+              local command = { 'pandoc', current_file, '-o', target }
+              local on_success = function(output)
+                print('Success!')
+                vim.api.nvim_echo({ { table.concat(output, '\n') } }, true, {})
+              end
+              local on_error = function(err)
+                print('Error!')
+                vim.api.nvim_echo({ { table.concat(err, '\n'), 'ErrorMsg' } }, true, {})
+              end
+              return exporter(command, target, on_success, on_error)
+            end
+          }
+        },
       })
 
       -- NOTE: If you are using nvim-treesitter with ~ensure_installed = "all"~ option
@@ -503,4 +522,9 @@ require("lazy").setup({
       vim.g.tidal_sc_enable = 1
     end,
   },
+
+  -- debugging support, needed for things like rustaceanvim
+  {
+    'mfussenegger/nvim-dap'
+  },
 })