docs: change branding Pawkey (#1)

- Change string instances from Sharkey to Pawkey
- Change logos and art to Pawkey
- Change repository URL where possible to our git repo
- Puppy > Shonks
- Change repo in compose_example.yml

Co-Authored-By: Bluey Heeler <bluey@pawkey.dev>

CONTRIBUTING.md

@@ -1,5 +1,5 @@
 # Contribution guide
-We're glad you're interested in contributing to Sharkey! In this document you will find the information you need to contribute to the project.
+We're glad you're interested in contributing to Pawkey! In this document you will find the information you need to contribute to the project.
 
 ## Roadmap
 See [ROADMAP.md](./ROADMAP.md) for the upstream Misskey roadmap.
@@ -133,7 +133,7 @@ An actual domain will be assigned so you can test the federation.
 		- `x.y.z` is the new version you are trying to release.
 3. Deploy and perform a simple QA check. Also verify that the tests passed.
 4. Merge it. (Do not squash commit)
-5. Create a [release](https://activitypub.software/TransFem-org/Sharkey/-/releases)
+5. Create a [release](https://git.leafus.net/pawkey/pawkey/-/releases)
 	- The target branch must be `stable`
 	- The tag name must be the version
 
@@ -257,7 +257,7 @@ See [`/packages/backend/test-federation/README.md`](/packages/backend/test-feder
 - `MISSKEY_WEBFINGER_USE_HTTP`: If it's set true, WebFinger requests will be http instead of https, useful for testing federation between servers in localhost. NEVER USE IN PRODUCTION.
 
 ## Continuous integration
-Sharkey uses GitLab CI for executing automated tests.
+Pawkey uses GitLab CI for executing automated tests.
 Configuration files are located in [`/.gitlab-ci.yml`](.gitlab-ci.yml).
 
 ## Vue
@@ -624,7 +624,7 @@ ESMではディレクトリインポートは廃止されているのと、デ
 
 ### Memory Caches
 
-Sharkey offers multiple memory cache implementations, each meant for a different use case.
+Pawkey offers multiple memory cache implementations, each meant for a different use case.
 The following table compares the available options:
 
 | Cache               | Type      | Consistency | Persistence | Data Source | Cardinality | Eviction | Description                                                                                                                                                                                                                                                                |