Add JsonWriterOptions to TemplateOptions and TemplateContext

[Copilot]

Adds configurable JsonWriterOptions to TemplateOptions and TemplateContext, allowing fine-grained control over JSON serialization (indentation, encoding, depth limits) in the json filter.

Changes

• TemplateOptions: Added JsonWriterOptions property with default value (non-indented)
• TemplateContext: Added JsonWriterOptions property initialized from TemplateOptions in constructor
• MiscFilters.Json: Now uses context.JsonWriterOptions directly without argument support
• Tests: Added coverage for options from both TemplateOptions and TemplateContext, and enum serialization

Breaking Change

⚠️ The json filter no longer accepts arguments. Previously, you could pass a boolean argument to control indentation (e.g., {{ data | json: true }}). This functionality has been removed. Configure output formatting via JsonWriterOptions in TemplateOptions or TemplateContext instead.

Usage

var options = new TemplateOptions
{
    JsonWriterOptions = new JsonWriterOptions
    {
        Indented = true,
        MaxDepth = 32,
        Encoder = JavaScriptEncoder.UnsafeRelaxedJsonEscaping
    }
};

var context = new TemplateContext(options);
// All json filter calls now use these configured options

{{ data | json }}

By default, JsonWriterOptions produces non-indented (compact) JSON output.

Original prompt

Feature: Make JsonWriterOptions reusable and configurable via TemplateOptions and TemplateContext, and update documentation.

• Add JsonWriterOptions property to TemplateOptions, with XML doc comments styled like similar properties.
• Add JsonWriterOptions property to TemplateContext, initialized from TemplateOptions in constructor, also with XML doc comments.
• Update MiscFilters.Json filter to use context.JsonWriterOptions instead of context.Options.JsonWriterOptions (preserving argument override for Indented).
• Add and update tests in MiscFiltersTests to verify options from TemplateOptions and TemplateContext are respected, and that enums can be serialized appropriately.
• If other properties in TemplateOptions or TemplateContext have XML docs, match style and placement.

This pull request was created as a result of the following prompt from Copilot chat.

Feature: Make JsonWriterOptions reusable and configurable via TemplateOptions and TemplateContext, and update documentation.

• Add JsonWriterOptions property to TemplateOptions, with XML doc comments styled like similar properties.
• Add JsonWriterOptions property to TemplateContext, initialized from TemplateOptions in constructor, also with XML doc comments.
• Update MiscFilters.Json filter to use context.JsonWriterOptions instead of context.Options.JsonWriterOptions (preserving argument override for Indented).
• Add and update tests in MiscFiltersTests to verify options from TemplateOptions and TemplateContext are respected, and that enums can be serialized appropriately.
• If other properties in TemplateOptions or TemplateContext have XML docs, match style and placement.

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[sebastienros]

@copilot change the behavior of the json filter so it doesn't take an argument. Instead it will use the context option as it is. By default the JsonWriterOptions should not be indented, this might be a breaking change.

[Copilot]

@copilot change the behavior of the json filter so it doesn't take an argument. Instead it will use the context option as it is. By default the JsonWriterOptions should not be indented, this might be ...

Done in commit a9eb47a. The json filter now uses context.JsonWriterOptions directly without any argument support. JsonWriterOptions defaults to non-indented output (Indented=false). Removed the test that was checking argument override behavior.

[sebastienros]

@copilot The initialization is unnecessary because the value is set in the constructor from the TemplateOptions