Remove templates in favour of shared templates

.gitlab/CODEOWNERS

-# Default rule:
-* @EIP-devs
-
-# Special casing; these cannot be changed without project owner confirmation
-CODEOWNERS @otto
-LICENSE @otto
-LICENSE.header @otto
-
-# Files that should be looked at by more experienced developers
-/src/ @Senior-devs
-CONTRIBUTING.md @EIP-devs @Senior-devs
-README.md @EIP-devs @Senior-devs
-
-# potentially scary changes in here should be covered by the special automagic approval rules
-build.gradle.kts @EIP-devs @Senior-devs

.gitlab/issue_templates/Bug.md

-### Summary
-<!-- Explain the bug -->
-
-### Steps to Reproduce
-<!-- The steps that anyone can follow to get the bug -->
-1.
-2.
-3.
-
-### Possible Fix
-<!-- If you have a hunch on what the problem is and might know how to fix it,
-     enter this here -->
-
-### Logs
-<!-- If possible, add a log file here -->

.gitlab/issue_templates/Endpoint.md

-### Endpoint (Method)
-<!-- An Endpoint allows a connecting service to make an HTTP call to LabraCORE -->
-
-<!-- In this table, layout what information you want to get out of LabraCORE
-     and what information you expect to have to give LabraCORE -->
-| Params | Type | Comment |
-|--------|------|---------|
-| Input  |      |         |
-|        |      |         |
-| Output |      |         |
-
-##### What does this method do?
-<!-- Explain here, in however many steps needed, how you expect to go from
-     input to output. In many cases, this can just be a short explanation
-     of what you expect to come out. -->
-1. 
-2. 
-
-<!-- If you need DTOs/information packages to be sent back to you, enter those here -->
-### DTOs required
-<!-- The name of the DTO class -->
-Name:
-
-<!-- Whether the DTO represents the creation of some object, the updating (Patching)
-     of some object, or the view of an object -->
-This DTO is a:
-* [ ] Create
-* [ ] Patch
-* [ ] View
-
-The DTO has the following fields:
-<!-- Explain the fields in this DTO, also add any additional comments on each field here -->
-| Type | Name | Comment |
-|------|------|---------|
-|      |      |         |
-|      |      |         |

.gitlab/issue_templates/Feature.md

-### Description
-<!-- Explain the feature and why you want it -->

.gitlab/merge_request_templates/MR.md

-### What does this MR do (summary)?
-
-#### Screenshots
-
-### What changes have you made (detailed)?
-
-### Does this MR meet the acceptance criteria?
-* [ ] The main application was run to make sure the server still runs without errors.
-* [ ] Tests were written to verify the behaviour of this code.
-* [ ] Javadoc and other comments were added to make the code understandable.
-* [ ] The code adheres to the style guidelines.
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