Dashboard fixes for PHP 8.3

[dalers]

1. corrects failing on PHP 8.3.6 due to uninitialized array variable "ScriptArray" (does not fail on 8.2.32)
2. prevent incorrect 2nd insert causing SQL duplicate key error (hidden with production debug settings)

Function Call StackFrame File Line Function Class Arguments
0 /home/dale/weberp/includes/ConnectDB_mariadb.php 82 ShowDebugBackTrace N/A
Array
(
    [0] => The SQL that failed was
    [1] => INSERT INTO scripts (script,
                                pagesecurity,
                                description
                            ) VALUES (
                                'mrp_dashboard.php',
                                '1',
                                'MRP Status'
                            )
)

1/home/dale/weberp/DashboardConfig.php 70 DB_query N/A
Array
(
    [0] => INSERT INTO scripts (script,
                                pagesecurity,
                                description
                            ) VALUES (
                                'mrp_dashboard.php',
                                '1',
                                'MRP Status'
                            )
)

3. added Copilot direction file for developing using VS Code on WSL Ubuntu and at least free plan for GitHub Copilot ("2,000 completions per month").

[dalers]

The CI tests are failing again seemingly due to API issues. This seems like a repeat of my previous PR when the tests all failed due to API issues, and then @timschofield restarted the tests and they all passed.

I unfortunately can't see a way to re-start the tests myself, but suspect this actually a symptom of some bigger issues that we need to figure out.

@pakricard and @timschofield, I'd feel better if one of you reviewed the changes and merged the PR. Thanks! :-)

[dalers]

Found how to re-run the CI tests and now they all pass. One of these days I'll have to learn how they work.

[dalers]

PR cancelled due to new commits, will send new PR based on current code.