Add project parameter - Githubissues

Description

Adds an additional parameter to the dita-ot-action, builds can be configured without transtype, properties or other filters

 - name: Build PDF 🖨️
        uses: dita-ot/dita-ot-action@master
        with:
          install: |
            # A series of bash statements (optional)
          plugins: |
            # A set of DITA-OT Plugins (optional)
          project: pdf.xml

[INFO] DITA-OT version 3.6.1
[INFO] Installing prerequisite DITA-OT plugins
...
[INFO] Installing using command-line
...
[INFO] Building project pdf.xml

Motivation and Context

Since DITA-OT 3.4. it has been possible to build a project from the command line. This option is missing from the current dita-ot-action

How Has This Been Tested?

Sample build run can be seen here

Type of Changes

New feature

Documentation and Compatibility

What documentation changes are needed for this feature? A new sample GitHub Action should be added to the docs after this is merged.
Will this change affect backwards compatibility or other users' overrides? This change is backwards compatible

Checklist

My code follows the code style of this project.
I have updated the unit tests to reflect the changes in my code.

dita-ot / dita-ot-action

Add project parameter #4