feat(common): Add integrated homepage support (#605)

**Description**
The old SCALE GUI, offered a clean way of showing an opening Apps.
Sadly enough this was:
A. Admin only
B. Crude

The new gui doesn't really show anything like that.
But on other platforms we've even less.

So by completely integrating Homepage, we can offer an unqique selling
point

⚒️ Fixes  #573 

**⚙️ Type of change**

- [x] ⚙️ Feature/App addition
- [ ] 🪛 Bugfix
- [ ] ⚠️ Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] 🔃 Refactor of current code

**🧪 How Has This Been Tested?**
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**📃 Notes:**
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**✔️ Checklist:**

- [ ] ⚖️ My code follows the style guidelines of this project
- [ ] 👀 I have performed a self-review of my own code
- [ ] #️⃣ I have commented my code, particularly in hard-to-understand
areas
- [ ] 📄 I have made corresponding changes to the documentation
- [ ] ⚠️ My changes generate no new warnings
- [ ] 🧪 I have added tests to this description that prove my fix is
effective or that my feature works
- [ ] ⬆️ I increased versions for any altered app according to semantic
versioning

**➕ App addition**

If this PR is an app addition please make sure you have done the
following.

- [ ] 🪞 I have opened a PR on
[truecharts/containers](https://github.com/truecharts/containers) adding
the container to TrueCharts mirror repo.
- [ ] 🖼️ I have added an icon in the Chart's root directory called
`icon.png`

---

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library/common/templates/class/_ingress.tpl

@@ -87,7 +87,7 @@ metadata:
   labels:
     {{- . | nindent 4 }}
   {{- end -}}
-  {{- $annotations := (mustMerge ($ingressAnnotations | default dict) (include "tc.v1.common.lib.metadata.allAnnotations" $ | fromYaml)) }}
+  {{- $annotations := (mustMerge ($ingressAnnotations | default dict) (include "tc.v1.common.lib.metadata.allAnnotations" $ | fromYaml) (include "tc.v1.common.lib.ingress.integration.homepage" (dict "objectData" $values "rootCtx" $) | fromYaml)) }}
   annotations:
   {{- with $values.certificateIssuer }}
     cert-manager.io/cluster-issuer: {{ tpl ( toYaml . ) $ }}

library/common/templates/lib/ingress/_validation.tpl

@@ -0,0 +1,14 @@
+{{/* Ingress Validation */}}
+{{/* Call this template:
+{{ include "tc.v1.common.lib.ingress.validation" (dict "objectData" $objectData) -}}
+objectData:
+  rootCtx: The root context of the chart.
+  objectData: The ingress object.
+*/}}
+
+{{- define "tc.v1.common.lib.ingress.validation" -}}
+  {{- $rootCtx := .rootCtx -}}
+  {{- $objectData := .objectData -}}
+
+
+{{- end -}}

library/common/templates/lib/ingress/integrations/_homepage.tpl

@@ -0,0 +1,35 @@
+{{/* Ingress Homepage Integration */}}
+{{/* Call this template:
+{{ include "tc.v1.common.lib.ingress.integration.homepage" (dict "rootCtx" $rootCtx "objectData" $objectData) -}}
+objectData:
+  rootCtx: The root context of the chart.
+  objectData: The ingress object.
+*/}}
+
+{{- define "tc.v1.common.lib.ingress.integration.homepage" -}}
+  {{- $rootCtx := .rootCtx -}}
+  {{- $objectData := .objectData -}}
+
+{{- if and $objectData.integration  $objectData.integration.homepage $objectData.integration.homepage.enabled -}}
+gethomepage.dev/enabled: "true"
+gethomepage.dev/name: {{ $objectData.integration.homepage.name | default ( camelcase $rootCtx.Chart.Name ) }}
+gethomepage.dev/description: {{ $objectData.integration.homepage.description | default $rootCtx.Chart.Description }}
+gethomepage.dev/group: {{ $objectData.integration.homepage.group | default "default" }}
+gethomepage.dev/icon: {{ $objectData.integration.homepage.icon | default $rootCtx.Chart.Icon }}
+{{- if $objectData.integration.homepage.podSelector -}}
+gethomepage.dev/pod-selector: {{ . }}
+{{- else -}}
+gethomepage.dev/pod-selector: ""
+{{- end -}}
+{{- with $objectData.integration.homepage.weight -}}
+gethomepage.dev/weight: {{ . }}
+{{- end -}}
+gethomepage.dev/widget.type: {{ $objectData.integration.homepage.widget.type | default $rootCtx.Chart.Name }}
+{{- with (index $objectData.hosts 0) -}}
+gethomepage.dev/widget.url: {{ $objectData.integration.homepage.widget.url | default (printf "%v%v" .host ( .path | default "/")) }}
+{{- end -}}
+{{- range $objectData.integration.homepage.widget.custom -}}
+gethomepage.dev/widget.{{ .name }}: {{ .value }}
+{{- end -}}
+{{- end -}}
+{{- end -}}