refactor: move Helm chart to standard directory structure

This commit restructures the paperless-ai Helm chart by moving all files
 from the nested directory (charts/paperless-ai/paperless-ai/) to the
 standard Helm chart directory structure (charts/paperless-ai/). The change
 eliminates the redundant directory nesting that was causing issues with
 Helm chart packaging and installation. No functional changes were made to
 any files - this is purely a directory structure reorganization to follow
 Helm best practices and improve chart maintainability.

charts/paperless-ai/templates/_helpers.tpl

@@ -0,0 +1,79 @@
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "paperless-ai.name" -}}
+{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Create a default fully qualified app name.
+We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
+If release name contains chart name it will be used as a full name.
+*/}}
+{{- define "paperless-ai.fullname" -}}
+{{- if .Values.fullnameOverride }}
+{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- $name := default .Chart.Name .Values.nameOverride }}
+{{- if contains $name .Release.Name }}
+{{- .Release.Name | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" }}
+{{- end }}
+{{- end }}
+{{- end }}
+
+{{/*
+Create chart name and version as used by the chart label.
+*/}}
+{{- define "paperless-ai.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Common labels
+*/}}
+{{- define "paperless-ai.labels" -}}
+helm.sh/chart: {{ include "paperless-ai.chart" . }}
+{{ include "paperless-ai.selectorLabels" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end }}
+
+{{/*
+Selector labels
+*/}}
+{{- define "paperless-ai.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "paperless-ai.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+{{- end }}
+
+{{/*
+Create the name of the service account to use
+*/}}
+{{- define "paperless-ai.serviceAccountName" -}}
+{{- if .Values.serviceAccount.create }}
+{{- default (include "paperless-ai.fullname" .) .Values.serviceAccount.name }}
+{{- else }}
+{{- default "default" .Values.serviceAccount.name }}
+{{- end }}
+{{- end }}
+
+{{/*
+Generiert den Inhalt der .env-Datei aus den Werten in .Values.secretEnv
+*/}}
+{{- define "generateEnv" -}}
+{{- if .Values.paperless.apiUrl }}PAPERLESS_API_URL={{ .Values.paperless.apiUrl }}{{ "\n" }}{{- end }}
+{{- if .Values.ai.provider }}AI_PROVIDER={{ .Values.ai.provider }}{{ "\n" }}{{- end }}
+{{- if .Values.ai.addProcessedTag }}ADD_AI_PROCESSED_TAG={{ .Values.ai.addProcessedTag }}{{ "\n" }}{{- end }}
+{{- if .Values.ai.processedTagName }}AI_PROCESSED_TAG_NAME={{ .Values.ai.processedTagName }}{{ "\n" }}{{- end }}
+{{- if .Values.prompt.useTags }}USE_PROMPT_TAGS={{ .Values.prompt.useTags }}{{ "\n" }}{{- end }}
+{{- if .Values.prompt.tags }}PROMPT_TAGS={{ .Values.prompt.tags }}{{ "\n" }}{{- end }}
+{{- if .Values.scanInterval }}SCAN_INTERVAL={{ .Values.scanInterval }}{{ "\n" }}{{- end }}
+{{- if .Values.systemPrompt }}SYSTEM_PROMPT=`{{ .Values.systemPrompt }}`{{ "\n" }}{{- end }}
+{{- if .Values.processPredefinedDocuments }}PROCESS_PREDEFINED_DOCUMENTS={{ .Values.processPredefinedDocuments }}{{ "\n" }}{{- end }}
+TAGS={{ .Values.tags }}{{ "\n" }}
+{{- if .Values.openAi.model }}OPENAI_MODEL={{ .Values.openAi.model }}{{ "\n" }}{{- end }}
+{{- end }}