Ignore dist files in repository, update PRtemplate (marktext#1894)

* Ignore all permutations of dist in git

* Update PR template to direct contributors

The current template is largely being ignored with many PRs coming
through with "yes/no". Hopefully the text at the top will actually catch
peoples attention and keep the "clutter blindness" down that I think is
making people ignore the table entirely.

Also the note about dist files is pretty unnecessary with a properly
setup gitignore file.

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,3 +1,6 @@
+<!-- Please change the Answers in the table below
+     to reflect the contents of your pull request. -->
+
 | Q                | A
 | ---------------- | ---
 | Bug fix?         | yes/no
@@ -11,7 +14,3 @@
 ### Description
 
 [Description of the bug or feature]
-
---
-
-#### Please don't submit `/dist` files with your PR!

.gitignore

@@ -1,9 +1,8 @@
 .DS_Store
-dist/electron/*
-dist/web/*
+dist/
+*/dist/*
 build/*
 static/themes/*
-src/muya/dist/
 src/muya/node_modules/
 coverage
 .vscode