Added GitHub templates [ci skip]

Author: sergeyklay

.github/ISSUE_TEMPLATE.md

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+> Questions should go to https://forum.zephir-lang.com
+> Documentation issues should go to https://github.com/phalcon/zephir-docs
+
+### Expected and Actual Behavior
+
+> **Describe what you are trying to achieve and what goes wrong.**
+
+> Provide output if related. Provide coredump if any. Use https://github.com/phalcon/cphalcon/wiki/Generating-a-backtrace as reference
+
+```php
+// paste output here
+```
+> Provide minimal script to reproduce the issue
+
+```php
+// paste code
+```
+### Details
+
+* Zephir Parser version: (`php --ri "Zephir Parser""`)
+* PHP Version: (`php -v`)
+* Operating System:
+* Installation type: Compiling from source || installing via package manager
+* Compiller version (if any):
+* Zephir version (if any):
+* Other related info: 

.github/PULL_REQUEST_TEMPLATE.md

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+Hello!
+
+* Type: bug fix | new feature | code quality | documentation
+* Link to issue:
+
+**In raising this pull request, I confirm the following (please check boxes):**
+
+- [ ] I have read and understood the [Contributing Guidelines](https://github.com/phalcon/php-zephir-parser/blob/master/CONTRIBUTING.md)?
+- [ ] I have checked that another pull request for this purpose does not exist.
+- [ ] I wrote some tests for this PR.
+
+Small description of change:
+
+Thanks