Contribute Medium-Large Libraries to DAX Lib

This section is a work in progress and will be completed soon.

You don’t have to create a repository for your DAX library on daxlib.org, but it’s a smart move if you expect the library to grow. A GitHub repo helps you track issues, accept contributions, and manage changes easily.

To create a GitHub repository for your DAX library, ensure you have a GitHub account; if not, create one. Then, follow the instructions at https://github.com/daxlib/lib-quickstart-template

You can follow these steps to add a new package to DAX Lib:

Create a name for your package following the naming conventions for both the name of the library and the package.
Create the manifest in manifest.daxlib file.

The manifest.daxlib is a mandatory file contains the package properties in JSON format. You can see the DaxLib.Sample package for an example and refer to the JSON schema for the complete specification of available properties.

The manifest file should be located in the root folder of the library:
```
 /manifest.daxlib
```
Create the DAX user-defined functions in lib/functions.tmdl and follow the naming conventions for the function names.

The file lib/functions.tmdl is a mandatory file and contains the source code of the DAX user-defined functions using the TMDL syntax. For an example, see the DaxLib.Sample package.

Remarks:
- The functions.tmdl file should contain only the function definitions without the createOrReplace command.
- Optional: add comments describing the function and its parameters to improve readability and usability, as suggested in the DAX naming convention.
- Each UDF must include the mandatory annotations: DAXLIB_PackageId and DAXLIB_PackageVersion.
  
  Example: for a library named Contoso.Conversion with version 1.0.0 the annotations should be:
```
  annotation DAXLIB_PackageId = Contoso.Conversion
  annotation DAXLIB_PackageVersion = 1.0.0
```
(Optional) Add a custom icon for your library

You can include a custom icon for your library by adding a PNG file inside the library’s folder.

Remarks:
- The icon file must be in PNG format (.PNG), with a maximum size of 100 KB.
- Place the icon file at:
```
 /icon.png
```
If you include a library icon, you must also update the manifest.daxlib to specify the file path.
```
 {
   // ...other manifest properties...
   "icon": "/icon.png"
 }
```
(Optional) Add a README file

You can include a README file to provide documentation for your library. It can include general information about the library, usage instructions, examples, and any notes for users.

Remarks:
- The file must be in Markdown format (.MD), with a maximum size of 100 KB.
- For security reasons, only a limited set of Markdown features are supported, and external links may be restricted to trusted domains.
Place the README file at:
```
 /README.md
```
If you include a README file, you must also update the manifest.daxlib to specify the file path.
```
 {
   // ...other manifest properties...
   "readme": "/README.md"
 }
```
Create a pull request to publish the library on daxlib.org following the instruction at https://github.com/daxlib/lib-quickstart-template.
- The pull request must be approved manually by DaxLib owners/maintainers.
- When the pull request is approved, the package is immediately published.