feat(SimpleCachePlugin.kt): add error handling for failed calls

[ShiinaKin]

Add on(CallFailed) hook to handle and log failed calls, improving error management within the SimpleCachePlugin.

Close #19

[Scogun]

Hello @ShiinaKin!

Thank you for the PR!
Please, increase the version and update the version in readme's.

[Scogun]

Increase the version and update readmes

[Scogun]

Please also add the test:

1. Add the endpoint (/failed, for example) here https://github.com/ShiinaKin/ktor-simple-cache/blob/issue/19/ktor-simple-cache/src/test/kotlin/com/ucasoft/ktor/simpleCache/TestApplication.kt#L32
2. Create the test by analogy with https://github.com/ShiinaKin/ktor-simple-cache/blob/issue/19/ktor-simple-cache/src/test/kotlin/com/ucasoft/ktor/simpleCache/SimpleCacheTests.kt#L139C1-L158C6

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud