Update issues templates

.github/ISSUE_TEMPLATE/event-type-proposal.md

@@ -1,20 +0,0 @@
----
-name: Event type proposal
-about: Suggest a type of event you'd like to see implemented in Kosmorro
-title: ''
-labels: "enhancement, \U0001F320 events"
-assignees: ''
-
----
-
-**Event type**: 
-**Involved objects (check the boxes)**:
-- [ ] Sun
-- [ ] Earth's moon
-- [ ] Planets
-
-**Definition of the event:**
-
-<!-- Replace this comment with the official definition of the event type, with a link to its source. -->
-
-**Other useful information** (implementation proposal, etc):

.github/ISSUE_TEMPLATE/feature_request.md

@@ -7,14 +7,8 @@ assignees: ''
 
 ---
 
-**Is your feature request related to a problem? Please describe.**
-A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+<!--
 
-**Describe the solution you'd like**
-A clear and concise description of what you want to happen.
+    Explain here the feature you would like to see in Kosmorro.
 
-**Describe alternatives you've considered**
-A clear and concise description of any alternative solutions or features you've considered.
-
-**Additional context**
-Add any other context or screenshots about the feature request here.
+-->

.github/ISSUE_TEMPLATE/suggest_event_type.yml

@@ -0,0 +1,45 @@
+name: Event type
+description: Suggest an event type
+labels:
+  - enhancement
+  - events
+
+body:
+  - type: markdown
+    attributes:
+      value: |
+        If you think that there's a missing supported event type, fill this form out to suggest it!
+
+  - type: checkboxes
+    id: involved-objects
+    attributes:
+      label: Involved objects
+      description: |
+        An event must involve at least one object.
+        Please select below the objects that take part in it.
+
+        For example, a lunar eclipse involves the Moon, the Earth and the Sun.
+
+      options:
+        - label: Sun
+        - label: Earth
+        - label: Moon
+        - label: Planets or dwarf planets of the Solar system
+        - label: Other (explain in description)
+
+  - type: textarea
+    id: event-definition
+    validations:
+      required: true
+    attributes:
+      label: Event definition
+      description: |
+        Explain the event type you wish to see in Kosmorro.
+        This can be a simple copy and paste from an external source (don't forget to give the source!).
+
+  - type: textarea
+    id: other-information
+    attributes:
+      label: Other useful information
+      description: |
+        If you have any other useful information, feel free to put them here!