Add Speed Lines visual effect

[Copilot]

• Create BopVisualEffects/Effects/SpeedLines/SpeedLinesEffect.cs with IVisualEffectDefinition implementation and SpeedLinesRunner/SpeedLinesOverlay inner classes
• Register SpeedLinesEffect in EffectDefinitionRegistry.cs (alphabetically between Sepia and Vertical Flip)
• Add Speed Lines section to docs/effects/README.md (alphabetically between Sepia and Vertical Flip)
• Fix speed property to use correct Hz → rad/s conversion (* 2π) in flicker sine
• Fix build errors: remove using System;, use System.Action?, System.Random, System.Math.PI to match codebase conventions and resolve Random ambiguity
• Fix spelling consistency: replace British English ("centre", "centred", "randomised") with American English ("center", "centered", "randomized") in comments

Original prompt

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This section details on the original issue you should resolve

<issue_title>Speed effect</issue_title>
<issue_description>An effect where black, thin triangles coming from the edge of the screen towards the center show up and disappear to give a feeling of high speed.</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Speed effect #30

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[Copilot]

Pull request overview

Adds a new Speed Lines visual effect to the BopVisualEffects mod, expanding the set of editor/runtime visual overlays with an animated “high-speed motion” screen-edge triangle burst.

Changes:

• Introduces SpeedLinesEffect (template + scheduler + GL overlay runner) with alpha, count, and speed properties.
• Registers the new effect in EffectDefinitionRegistry in alphabetical order.
• Documents the effect in docs/effects/README.md (including the required preview placeholder).

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
docs/effects/README.md	Adds documentation for the new “Speed Lines” effect and its properties/preview placeholder.
BopVisualEffects/Effects/SpeedLines/SpeedLinesEffect.cs	Implements the new effect definition, runner lifecycle, and GL-based overlay rendering.
BopVisualEffects/Core/EffectDefinitionRegistry.cs	Registers SpeedLinesEffect so it appears in templates and runtime dispatch.

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[Brollyy]

@copilot Build failed: https://github.com/Brollyy/BopVisualEffects/actions/runs/23231452082/job/67528183559?pr=31

[Copilot]

@copilot Build failed: https://github.com/Brollyy/BopVisualEffects/actions/runs/23231452082/job/67528183559?pr=31

Fixed in 0a753ee. Two build errors were resolved:

1. CS0030 — replaced (Action?)SpawnAction with (System.Action?)SpawnAction to match codebase convention
2. CS0104 — removed using System; and fully qualified System.Random and System.Math.PI to eliminate the ambiguity between System.Random and UnityEngine.Random

[Copilot]

Pull request overview

Adds a new “Speed Lines” visual effect to the Bits & Bops editor mod, including runtime implementation, registration, and user-facing documentation.

Changes:

• Added SpeedLinesEffect implementation with a runner + camera overlay that renders animated inward-pointing triangles.
• Registered the new effect in EffectDefinitionRegistry in alphabetical order.
• Documented the new effect (properties + preview placeholder) in docs/effects/README.md.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 6 comments.

File	Description
docs/effects/README.md	Adds the “Speed Lines” section with properties and preview placeholder.
BopVisualEffects/Effects/SpeedLines/SpeedLinesEffect.cs	Implements the new speed-lines effect, runner lifecycle, and GL overlay rendering.
BopVisualEffects/Core/EffectDefinitionRegistry.cs	Registers SpeedLinesEffect and adds the namespace import.

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[Brollyy]

@copilot apply changes based on the comments in this thread

[Copilot]

@copilot apply changes based on the comments in this thread

Done in 03b095d — replaced all six British English spellings ("centre" → "center", "centred" → "centered", "randomised" → "randomized") in the comments of SpeedLinesEffect.cs.