Feature: Search: use /e flag

[mrthebob]

Execute Vim Mode Plus: Clip Debug Info(which write info to clipboard) then paste here.

debug info

{
  "atom": "1.42.0",
  "platform": "darwin",
  "release": "18.7.0",
  "vmpVersion": "1.36.4",
  "vmpConfig": {
    "automaticallyEscapeInsertModeOnActivePaneItemChange": true,
    "hideCommandsFromCommandPalette": true,
    "keymapBackslashToInnerCommentOrParagraphWhenToggleLineCommentsIsPending": true,
    "keymapCCToChangeInnerSmartWord": true,
    "keymapPToPutWithAutoIndent": true,
    "keymapSemicolonToInnerAnyPairInOperatorPendingMode": true,
    "keymapUnderscoreToReplaceWithRegister": true,
    "keymapYToYankToLastCharacterOfLine": true,
    "setCursorToStartOfChangeOnUndoRedo": true,
    "useSmartcaseForFind": true,
    "useSmartcaseForSearch": true
  }
}

Read and check all "Checklist" below.

Checklist

You have to check all before open issue.

• [x] Provide your environment info clipped by Vim Mode Plus: Clip Debug Info command.
• [x] Try with latest Atom and latest vim-mode-plus.
• [x] Pick a descriptive and non-ambiguous subject
• [x] Express "what" you want(feature? config option?, behavior change?) in short sentence(not long!).

We need the ability to search with the /e flag. This will place the cursor at the end of the search.

• [x] Contrast current behavior if you want to change current behavior, with sample text, operation(keystroke) and result.
• [x] Include real use case so that maintainer can understand "why" you need help.

Use case: when you want to affect the end of the search term, it's far more convenient to search, land where you want to affect, hit n to go to the next and just hit ., instead of having to hit n and then f<char> (potentially multiple times) and then ..

• [x] Include Atom(atom --version), vim-mode-plus version, and OS version(e.g. macOS Sierra 10.12.3).

macOS Mojave 10.14.6 Atom 1.42.0 vim-mode-plus 1.36.4

• [x] If keybinding issue, Read this.