[core] Update .github to match main repo

.github/FUNDING.yml

@@ -1,8 +1,8 @@
 # These are supported funding model platforms
 
 github: # Replace with up to 4 GitHub Sponsors-enabled usernames e.g., [user1, user2]
-patreon: dmtrKovalenko
-open_collective: # Replace with a single Open Collective username
+patreon: # Replace with a single Patreon username
+open_collective: material-ui
 ko_fi: # Replace with a single Ko-fi username
-tidelift: # Replace with a single Tidelift platform-name/package-name e.g., npm/babel
+tidelift: npm/@material-ui/core
 custom: # Replace with a single custom sponsorship URL

.github/ISSUE_TEMPLATE/1.bug.md

@@ -0,0 +1,68 @@
+---
+name: Bug report 🐛
+about: Create a bug report for Material-UI.
+labels: 'status: needs triage'
+---
+
+<!-- Provide a general summary of the issue in the Title above -->
+
+<!--
+  Thank you very much for contributing to Material-UI by creating an issue! ❤️
+  To avoid duplicate issues we ask you to check off the following list.
+-->
+
+<!-- Checked checkbox should look like this: [x] -->
+
+- [ ] The issue is present in the latest release.
+- [ ] I have searched the [issues](https://github.com/mui-org/material-ui/issues) of this repository and believe that this is not a duplicate.
+
+## Current Behavior 😯
+
+<!-- Describe what happens instead of the expected behavior. -->
+
+## Expected Behavior 🤔
+
+<!-- Describe what should happen. -->
+
+## Steps to Reproduce 🕹
+
+<!--
+  Provide a link to a live example (you can use codesandbox.io) and an unambiguous set of steps to reproduce this bug.
+  Include code to reproduce, if relevant (which it most likely is).
+
+  You should use the official codesandbox template as a starting point: https://material-ui.com/r/issue-template
+
+  If you have an issue concerning TypeScript please start from this TypeScript playground: https://material-ui.com/r/ts-issue-template
+
+  Issues without some form of live example have a longer response time.
+-->
+
+Steps:
+
+1.
+2.
+3.
+4.
+
+## Context 🔦
+
+<!--
+  What are you trying to accomplish? How has this issue affected you?
+  Providing context helps us come up with a solution that is most useful in the real world.
+-->
+
+## Your Environment 🌎
+
+<!--
+  Include as many relevant details about the environment with which you experienced the bug.
+  If you encounter issues with typescript please include version and tsconfig.
+-->
+
+| Tech        | Version |
+| ----------- | ------- |
+| Material-UI | v4.?.?  |
+| Material-UI pickers | v4.?.?  |
+| React       |         |
+| Browser     |         |
+| TypeScript  |         |
+| etc.        |         |

.github/ISSUE_TEMPLATE/2.feature.md

@@ -0,0 +1,34 @@
+---
+name: Feature request 💄
+about: Suggest a new idea for the project.
+labels: 'status: needs triage'
+---
+
+<!-- Provide a general summary of the feature in the Title above -->
+
+<!--
+  Thank you very much for contributing to Material-UI by creating an issue! ❤️
+  To avoid duplicate issues we ask you to check off the following list.
+-->
+
+<!-- Checked checkbox should look like this: [x] -->
+
+- [ ] I have searched the [issues](https://github.com/mui-org/material-ui/issues) of this repository and believe that this is not a duplicate.
+
+## Summary 💡
+
+<!-- Describe how it should work. -->
+
+## Examples 🌈
+
+<!--
+  Provide a link to the Material design specification, other implementations,
+  or screenshots of the expected behavior.
+-->
+
+## Motivation 🔦
+
+<!--
+  What are you trying to accomplish? How has the lack of this feature affected you?
+  Providing context helps us come up with a solution that is most useful in the real world.
+-->

.github/ISSUE_TEMPLATE/3.material-design.md

@@ -0,0 +1,5 @@
+---
+name: Material design issue
+about: An issue with one of our components regarding the Material design guidelines.
+labels: 'status: needs triage, material design system'
+---

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,5 @@
+blank_issues_enabled: false # force the usage of a template
+contact_links:
+  - name: Support ❔
+    url: https://material-ui.com/getting-started/support/
+    about: I need support with Material-UI.

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,5 +1,3 @@
-<!-- Thanks so much for your time taking to contribute, your work is appreciated! ❤️ -->
+<!-- Thanks so much for your PR, your contribution is appreciated! ❤️ -->
 
-This PR closes # <!-- Please refer issue number here, if exists -->
-
-## Description
+- [ ] I have followed (at least) the [PR section of the contributing guide](https://github.com/mui-org/material-ui/blob/master/CONTRIBUTING.md#sending-a-pull-request).