Refs #20107: Add PR template

Signed-off-by: JesusPoderoso <jesuspoderoso@eprosima.com>

Author: JesusPoderoso

.github/pull_request_template.md

@@ -0,0 +1,44 @@
+<!-- Provide a general summary of your changes in the Title above -->
+<!-- It must be meaningful and coherent with the changes -->
+
+<!--
+    If this PR is still a Work in Progress [WIP], please open it as DRAFT.
+    Please consider if any label should be added to this PR.
+-->
+
+## Description
+<!--
+    Describe changes in detail.
+    If several features/bug fixes are included with these changes, please consider opening separated pull requests.
+-->
+
+<!--
+    In case of bug fixes, please provide the list of supported branches where this fix should be also merged.
+    Please uncomment following line, adjusting the corresponding target branches for the backport.
+-->
+<!-- @Mergifyio backport 1.4.x 1.3.x 1.2.x 1.1.x -->
+
+<!-- If an issue is already opened, please uncomment next line with the corresponding issue number. -->
+<!-- Fixes #(issue) -->
+
+<!-- In case the changes are built over a previous pull request, please uncomment next line. -->
+<!-- This PR depends on #(PR) and must be merged after that one. -->
+
+<!-- In case the changes are related to an implementation PR, please uncomment the next lines. -->
+<!--
+Related implementation PR:
+* eProsima/Fast-DDS#(PR)
+-->
+
+## Contributor Checklist
+
+- [ ] Commit messages follow the project guidelines. <!-- External contributors should sign the DCO. Fast DDS python developers must also refer to the internal Redmine task. -->
+- [ ] Code builds and tests pass locally.
+- [ ] Applicable backports have been included in the description.
+
+## Reviewer Checklist
+
+- [ ] The PR has a milestone assigned.
+- [ ] The title and description correctly express the PR's purpose.
+- [ ] Check contributor checklist is correct.
+- [ ] CI passes without warnings or errors.