Conventions batch 1: icons, template file names, cosmetics

- Add icon: to all 17 Chart.yaml (official project icons); removes the
  last helm lint --strict INFO finding across the repo
- Rename template files to the <app>.<kind>.yaml scheme (apache-tika,
  gotenberg, teamspeak-server PVC, paperless-ngx configmap) - pure
  git mv, no content changes
- template-chart: fix missing space in {{ .Chart.Name}} and rename the
  ConfigMap resource -config-map -> -configmap (chart is never published)
- rallly: fix typos in required messages (rallySecret -> ralllySecret,
  databseSecret -> databaseSecret)
- README: document the deliberate PVC-name exception from the naming
  scheme (renames would provision new empty volumes)
- Patch-bump all 16 published charts

Rendered resources are byte-identical for all published charts (only
helm's '# Source:' comments change for the renamed files); the only
render change is the template-chart ConfigMap name.

Part of #32

paperless-ngx/templates/pre-post-consumption-scripts.configmap.yaml

@@ -0,0 +1,53 @@
+{{- if false }}
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ .Release.Name }}-{{ .Chart.Name }}-pre-post-consumption-scripts
+data:
+  pre-consume-script: |-
+    #!/bin/sh
+    set -x
+
+    # Pre-Consumption Scripts:
+    {{- range  $key, $value := .Values.paperless.scripts.preConsumptionScripts }}
+    /scripts/{{ $value }}
+    {{- end }}
+
+  post-consume-script: |-
+    #!/bin/sh
+    set -x
+
+    # Post-Consumption Scripts:
+    {{- range  $key, $value := .Values.paperless.scripts.postConsumptionScripts }}
+    /scripts/{{ $value }}
+    {{- end }}
+
+  remove-blank-lines: |-
+    #!/bin/bash
+    set -e -o pipefail
+    export LC_ALL=C
+
+    #IN="$1"
+    IN="$DOCUMENT_WORKING_PATH"
+
+    PAGES=$(pdfinfo "$IN" | grep ^Pages: | tr -dc '0-9')
+    THRESHOLD=0.002
+
+    non_blank() {
+      for i in $(seq 1 $PAGES) ; do
+        PERCENT=$(gs -o -  -dFirstPage=${i} -dLastPage=${i} -sDEVICE=inkcov "${IN}" | grep CMYK | nawk 'BEGIN { sum=0; } {sum += $1 + $2 + $3 + $4;} END { printf "%.5f\n", sum } ')
+        if awk "BEGIN { exit !($PERCENT > $THRESHOLD) }"; then
+          echo $i
+        else
+          >&2 echo Color-sum is $PERCENT: will remove blank page $i of $IN
+        fi
+      done
+    }
+
+    NON_BLANK=$(non_blank)
+
+    if [ -n "$NON_BLANK" ]; then
+      NON_BLANK=$(echo $NON_BLANK  | tr ' ' ",")
+      qpdf "$IN" --replace-input --pages . $NON_BLANK --
+    fi
+  {{- end }}