## Description
This PR adds the spotless formatter and validator for the JSON files
present in the project. If there is any invalid JSON file, the formatter
fails and logs the file and the error LOC to be fixed.
Since Spotless is already added to the pre-commit hook it also makes it
necessary to fix the JSON and then commit the changes.
Screenshot of the errors displayed for Invalid JSONs
### Why is this Important?
All of our datasource forms appear on the UI from the JSON configuration
files in the plugins. If an Invalid JSON is added, it can break the
datasource usage experience for the users.
One such instance happened in the past, where due to a JSON formatting
error, the users could not use Smart Substitution feature on production.
[Reference](https://theappsmith.slack.com/archives/C040LHZN03V/p1721124893238579)
Fixes#34969
## Automation
/ok-to-test tags="@tag.Sanity"
### 🔍 Cypress test results
<!-- This is an auto-generated comment: Cypress test results -->
> [!TIP]
> 🟢🟢🟢 All cypress tests have passed! 🎉🎉🎉
> Workflow run:
<https://github.com/appsmithorg/appsmith/actions/runs/10243164292>
> Commit: 08bc87acd2e44c4a2677d3eed1bad002f991050a
> <a
href="https://internal.appsmith.com/app/cypress-dashboard/rundetails-65890b3c81d7400d08fa9ee5?branch=master&workflowId=10243164292&attempt=1"
target="_blank">Cypress dashboard</a>.
> Tags: `@tag.Sanity`
> Spec:
> <hr>Mon, 05 Aug 2024 05:50:07 UTC
<!-- end of auto-generated comment: Cypress test results -->
## Communication
Should the DevRel and Marketing teams inform users about this change?
- [ ] Yes
- [ ] No
Solves a single thing in the build configurations, resulting in a few
wins.
1. Reduced number of warnings in the output.
1. In release branch:
```
mvn clean package -DskipTests | grep --fixed-strings --count '[WARNING]'
3233
```
1. In this PR's branch:
```
mvn clean package -DskipTests | grep --fixed-strings --count '[WARNING]'
172
```
2. All uber-jar files are shaded twice, currently. Once with the default
execution of `maven-shade-plugin`, and again with the `shade-plugin-jar`
execution in these `pom.xml` files. This is double-work, and is the
cause of most of the warnings we see.
1. This `shade-plugin-jar` was added to have the plugin information
included in the `/META-INF/MANIFEST.MF` file, since we can't configure
the default execution of the shade plugin (it comes to us from Spring
Boot).
2. Instead, we switch to configuring plugin information in a
`/plugin.properties` file.
3. Previously, we used `/plugin.properities` for plugin information in
dev time, and `/META-INF/MANIFEST.MF` in production. This PR will change
it so that we use `/plugin.properties` all the time. We configure PF4J
with a custom plugin manager to achieve this.
3. Moved all `plugin.properties` into `src/main/resources`, so that they
land up in the root of the final jar files. But this means, during
development, loading the plugin fails since it looks for a
`plugin.properties` at the root of the plugin module, i.e., next to the
`src` folder.
1. For this, in the custom plugin manager class, we change where we look
for the `plugin.properties` file during development mode. In this mode,
we look at the `target/classes/plugin.properties` file, which is where
maven saves this file, taken from
`src/main/resources/plugin.properties`.
2. This also solves the duplication of the plugin properties that's
currently present, between `plugin.properties` and the `<properties>`
section of `pom.xml` files.
Here's the shade plugin's default execution and configuration, from
Spring Boot:
https://github.com/spring-projects/spring-boot/blob/v3.0.1/spring-boot-project/spring-boot-starters/spring-boot-starter-parent/build.gradle#L174.
