techdocs-added (#186)

## Description

Please include a summary of the change and which issue is fixed. Please
also include relevant motivation and context. List any dependencies that
are required for this change.

Fixes # (issue)

## Type of change

Please delete options that are not relevant.

- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] Intermediate change (work in progress)

## How Has This Been Tested ?

Please describe the tests that you ran to verify your changes. Provide
instructions so we can reproduce. Please also list any relevant details
for your test configuration

- [ ] Test A
- [ ] Test B

## Checklist:

- [ ] Performed a self-review of my own code
- [ ] npm test passes on your machine
- [ ] New tests added or existing tests modified to cover all changes
- [ ] Code conforms with the style guide
- [ ] API Documentation in code was updated

catalog-info.yaml

@@ -4,6 +4,7 @@ metadata:
   name: loopback4-soft-delete
   annotations:
     github.com/project-slug: sourcefuse/loopback4-soft-delete
+    backstage.io/techdocs-ref: dir:.
   namespace: arc
   description: A LoopBack 4 Extension for soft delete feature.
   tags:

mkdocs.yml

@@ -0,0 +1,5 @@
+site_name: loopback4-soft-delete
+site_description: loopback4-soft-delete
+
+plugins:
+  - techdocs-core