rallly: NOTES.txt and the #157 number formatting (8.1.0+up4.13.0)

Two additive changes in one release.

multiplyQuantity turned a bare integer resource value of about 1e6 or more
into exponential notation and aborted the render with "unsupported resource
quantity suffix \"e+06\"". The null-safe helpers from #99 pass values through
fromYaml, which parses every number as float64, and Go's "%v" switches those
to exponential form. The new rallly.formatNumber helper forces plain decimal
notation on both the input and the non-integer product; it is the same wording
already merged into template-chart, zipline and voucher-vault.

The NOTES.txt prints what an operator would otherwise have to read out of the
templates: the rendered access URL or the port-forward command, the fields each
1Password item has to carry, the OIDC redirect URI, and the traps of this chart
- OIDC is the only way in because email login and registration are hard-coded
off, a rotated 1Password item does not restart the pods, the probes only prove
that the web process answers, and the Next.js cache emptyDir counts against the
container's ephemeral-storage limit.

Part of #157
Part of #43

rallly/Chart.yaml

@@ -5,7 +5,7 @@ icon: https://raw.githubusercontent.com/lukevella/rallly/main/apps/landing/publi
 
 type: application
 
-version: 8.0.1+up4.13.0
+version: 8.1.0+up4.13.0
 appVersion: "4.13.0"
 
 maintainers: