…ere recovery is difficult/impossible (#465)

This pull request updates multiple PowerShell functions to enhance user
safety by adding a `ConfirmImpact = 'High'` attribute to the
`[CmdletBinding]` declaration for commands that perform destructive
operations. This ensures users are explicitly prompted before executing
high-impact actions. Additionally, some minor formatting adjustments are
made.

- Fixes #184

### Adjustments to `ConfirmImpact` values:

* Updated high-impact function to prompt for confirmation
(`ConfirmImpact = 'High'`).
* Removed `ConfirmImpact` attribute for functions that have low impact.

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: MariusStorhaug <17722253+MariusStorhaug@users.noreply.github.com>

…xt type info (#469)

This pull request introduces improvements to error handling and
messaging in PowerShell scripts related to GitHub context validation and
GraphQL query execution. The changes enhance clarity and provide more
detailed error information for debugging purposes.

- Fixes #468

### Improvements to error handling

* Enhanced error message formatting in `Assert-GitHubContext.ps1`:
Updated the error message to include the context name, type, and
required types in a more readable format. This improves clarity when the
context authentication type does not match the required types for a
command.

* Detailed GraphQL error messages in `Invoke-GitHubGraphQLQuery.ps1`:
Added a clear header ("GraphQL errors occurred") and moved the full
error details to the beginning of the error message. This change makes
the error output more structured and easier to interpret.

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: MariusStorhaug <17722253+MariusStorhaug@users.noreply.github.com>
Co-authored-by: Marius Storhaug <marstor@hotmail.com>