Missing or bad documentation

[Claudenw]

Some documentation missing or bad links.

• README missing link to website: https://aiven-open.github.io/aiven-kafka-connector-framework/
• * main link to implementations.html has typo.
• * https://aiven-open.github.io/aiven-kafka-connector-framework/common/localConfiguration.html is missing
• * https://aiven-open.github.io/aiven-kafka-connector-framework/source/localConfiguration.html is missing
• * https://aiven-open.github.io/aiven-kafka-connector-framework/source/configuration.html is missing