tools, feat: add .github/PULL_REQUEST_TEMPLATE.md (#439)

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,20 @@
+Please fill in this template.
+
+- [ ] Use a meaningful title for the pull request with prefix '(module|object|source_directory) [bugfix|feat|refactor|]', Such as `db, bugfix: ...`, `tools, feat: ...`
+- [ ] Test the change in your own code. (Compile and run.)
+- [ ] Add or edit tests to reflect the change. (Run with `fibjs test`.)
+- [ ] Ensure commits history clean, merge master/dev and clean meaningless commits by `git rebase`.
+
+Select type of change you made and delete the others:
+
+If adding/changing one existing module or internal Object:
+- [ ] Add/Change the corresponding `*.idl` file
+- [ ] Run `fibjs ./tools/idlc.js` to auto-generate `*.h`, **never change it**
+
+If removing one existing module or internal Object:
+- [ ] Remove corresponding `*.h`, `*.idl`, `*.cpp`
+- [ ] Remove all reference to it.
+
+If adding internal js scripts:
+- [ ] Add it to `fibjs/scripts`
+- [ ] Run `fibjs ./tools/gen_script.js`