Fixed linter issues and removed leftovers

Minor spotless issues

requested by CR

as discussed in CR

as discussed in CR

* Command.java-> SlashCommand.java
* CommandHandler.java-> system\CommandSystem.java
* example\A...

Bumps com.github.johnrengelman.shadow from 7.0.0 to 7.1.0.

---
updated-dependencies:
- dependen...

Bumps [flyway-core](https://github.com/flyway/flyway) from 7.15.0 to 8.0.0.
- [Release notes](ht...

Bumps org.flywaydb.flyway from 7.15.0 to 8.0.0.

---
updated-dependencies:
- dependency-name: or...

Bumps [jackson-databind](https://github.com/FasterXML/jackson) from 2.12.5 to 2.13.0.
- [Release...

- /ping
- /db get key
- /db put key value

Hardcodes eclipse version to last known working version.

Bumps com.diffplug.spotless from 5.15.0 to 5.15.2.

---
updated-dependencies:
- dependency-name:...

* Add shutdown hook

* Fixed spotless issue

Co-authored-by: Jonas <[email protected]>

Bumps [junit-jupiter-engine](https://github.com/junit-team/junit5) from 5.8.0 to 5.8.1.
- [Relea...

Bumps [junit-jupiter-api](https://github.com/junit-team/junit5) from 5.8.0 to 5.8.1.
- [Release ...

Bumps JDA from 4.3.0_330 to 4.3.0_331.

---
updated-dependencies:
- dependency-name: net.dv8tion...

* added config file support

* var -> Config for readability

- Remove duplication from build scripts
- Add comments to the root build.gradle

Bumps jooq from 3.15.2 to 3.15.3.

---
updated-dependencies:
- dependency-name: org.jooq:jooq
...

Bumps JDA from 4.3.0_324 to 4.3.0_330.

---
updated-dependencies:
- dependency-name: net.dv8tion...

since we are running out of boosters and also for the future, i do not like to rely on this frag...

* Added PR template

Co-authored-by: Marko Radosavljević <[email protected]>

* Swap imports
* Use Function#identity() and remove the unnecessary comment

Previously they were left in the application module and therefore not
picked up by the database ...

Modularize database

Bumps [junit-jupiter-api](https://github.com/junit-team/junit5) from 5.7.2 to 5.8.0.
- [Release ...

Bumps [junit-jupiter-engine](https://github.com/junit-team/junit5) from 5.7.2 to 5.8.0.
- [Relea...

Added Command and AbstractCommand for commands to extend.
Added CommandExample and SubCommandExa...

* typos
* removal of some obsolete private docs
* changed section order in readme due to relevance

This ensures we notice a gradle/workflow change is broken *before* it is
merged.

* Various improvements to the DB code

Mostly shown by linter, some are:
* gitignore generate...

This allows `gradle jib` to succeed even though that runs flywayMigrate
before gradle creates th...

This patch adds jOOQ, Flyway and a simple Database class. The Database
class takes care of distr...

* Polished readme, trimmed contributing (wiki)

* Removed edit-leftovers

* Added TJ-Bot Tech Stack Diagram.drawio.xml

* Update TJ-Bot Tech Stack Diagram.drawio.xml

Fixes #76

This allows us to access secrets of the base repo (like the Java
version...) in PRs.

Added SQLite and simple example commands

This keeps the first method call on the same line and aligns on the
".":

```java
JDA jda = JDAB...

While not everything in this folder is user specific, we currently do
not want to communicate an...

Previously, enum constant would be wrapped as needed and not chopped
down:
```java
enum Foo {
...

* Add dependabot config
* Added a whitespace to the end of the file

* Bump gradle version to 7.2
* Add source and target compatibility versions to build.gradle

This hopefully makes formatting more consistent. The Eclipse XML style
was chosen as it is under...

Co-authored-by: Marko Radosavljević <[email protected]>