feat: add niri-ribbon viewport widget

[ews]

Added a new viewport mini-map widget for niri window manager. It provides real-time visual orientation for the horizontal window ribbon. Developed by J Pablo Puerta.

[github-actions]

Automatic Code Quality Review

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File: niri-ribbon/BarWidget.qml

• (H) Line 23: Do not use hardcoded values, always prefer to use the Style singleton instead

+        anchors.margins: 8

• (H) Line 26: Do not use hardcoded values, always prefer to use the Style singleton instead

+        radius: 4

• (H) Line 29: Do not use hardcoded values, always prefer to use the Style singleton instead

+        border.width: 1

• (H) Line 41: Do not use hardcoded values, always prefer to use the Style singleton instead

+            radius: 3

• (H) Line 50: Do not use hardcoded values, always prefer to use the Style singleton instead

+                anchors.margins: 1

• (H) Line 53: Do not use hardcoded values, always prefer to use the Style singleton instead

+                radius: 2

• (H) Missing required property widgetId. For example:

property string widgetId: ""

• (H) Missing required property section. For example:

property string section: ""

• (H) Missing required property sectionWidgetIndex. For example:

property int sectionWidgetIndex: -1

• (H) Missing required property sectionWidgetsCount. For example:

property int sectionWidgetsCount: 0

[github-actions]

Automatic Manifest Check

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File: niri-ribbon/manifest.json

• (H) Missing required property repository. For example:

"repository": "https://github.com/noctalia-dev/noctalia-plugins"