[Init]: Boilerplate scaffold removed (#12)

The module repository no longer contains placeholder template code from
the PSModule framework scaffolding. Only the `New-Jwt` placeholder
function remains, signaling that the module is ready for actual JWT
implementation work.

- Fixes #11

## Changed: Repository content

All template/demo artifacts are removed — classes (`Book`,
`SecretWriter`), functions (`Get-PSModuleTest`, `New-PSModuleTest`,
`Set-PSModuleTest`, `Test-PSModuleTest`), variables (`Planets`, `Moons`,
`SolarSystems`), data files, format definitions, type extensions, init
scripts, nested modules, script loaders, examples, and the manifest
override file.

What remains in `src/`:

```
src/
  functions/
    public/
      New-Jwt.ps1
```

The `New-Jwt` function emits a warning that it is not yet implemented.
This gives CI a valid function to build and test against while
development proceeds in #3.

## Changed: Test file

The test file is renamed from `PSModuleTest.Tests.ps1` to
`Jwt.Tests.ps1` with a single test verifying the placeholder warning
output.

## Changed: README

Rewritten to describe the Jwt module — name, purpose, installation, and
current development status.

## Technical Details

- Removed 32 files totaling ~660 lines of template code
- Code coverage target in `.github/PSModule.yml` lowered from 50% to 0%
— the placeholder function has no meaningful logic to cover
- The `manifest.psd1` is removed because it is optional in the PSModule
framework (only needed to override generated values); will be recreated
in #3 when module metadata is defined
- This PR completes the "Skeleton cleanup" section of the implementation
plan in #3

Author: MariusStorhaug

.github/PSModule.yml

@@ -4,7 +4,7 @@
 
 Test:
   CodeCoverage:
-    PercentTarget: 50
+    PercentTarget: 0
 #   TestResults:
 #     Skip: true
 #   SourceCode:

README.md

@@ -1,54 +1,37 @@
-# {{ NAME }}
+# Jwt
 
-{{ DESCRIPTION }}
+A PowerShell module for creating and managing JSON Web Tokens (JWT).
 
 ## Prerequisites
 
-This uses the following external resources:
+- [PowerShell 7+](https://learn.microsoft.com/en-us/powershell/scripting/install/installing-powershell)
 - The [PSModule framework](https://github.com/PSModule/Process-PSModule) for building, testing and publishing the module.
 
 ## Installation
 
-To install the module from the PowerShell Gallery, you can use the following command:
-
 ```powershell
-Install-PSResource -Name {{ NAME }}
-Import-Module -Name {{ NAME }}
+Install-PSResource -Name Jwt
+Import-Module -Name Jwt
 ```
 
 ## Usage
 
-Here is a list of example that are typical use cases for the module.
-
-### Example 1: Greet an entity
-
-Provide examples for typical commands that a user would like to do with the module.
+> [!NOTE]
+> This module is under active development. The placeholder function `New-Jwt` is available but not yet implemented.
 
 ```powershell
-Greet-Entity -Name 'World'
-Hello, World!
+New-Jwt
 ```
 
-### Example 2
+## Documentation
 
-Provide examples for typical commands that a user would like to do with the module.
+For more information about the module's functions and features, use:
 
 ```powershell
-Import-Module -Name PSModuleTemplate
+Get-Command -Module Jwt
+Get-Help New-Jwt
 ```
 
-### Find more examples
-
-To find more examples of how to use the module, please refer to the [examples](examples) folder.
-
-Alternatively, you can use the Get-Command -Module 'This module' to find more commands that are available in the module.
-To find examples of each of the commands you can use Get-Help -Examples 'CommandName'.
-
-## Documentation
-
-Link to further documentation if available, or describe where in the repository users can find more detailed documentation about
-the module's functions and features.
-
 ## Contributing
 
 Coder or not, you can contribute to the project! We welcome all contributions.