Merge ~dashmage/charm-hw-health:update-metadata into charm-hw-health:master

[Ashley James]

Update metadata to include docs and deprecation notice.

Link to discourse topic: https://discourse.charmhub.io/t/hw-health-docs-index/11088

Followed these steps: https://juju.is/docs/sdk/add-docs-to-your-charmhub-page#heading--create-docs-for-your-charm-on-discourse

[🤖 Canonical IS Merge Bot (canonical-is-mergebot)]

This merge proposal is being monitored by mergebot. Change the status to Approved to merge.

[Eric Chen (eric-chen)]

review: Approve

[🤖 prod-jenkaas-bootstack (prod-jenkaas-bootstack)]

PASSED: Continuous integration, rev:97044742e9e4efdba0b01c762bd910d808344902
https://jenkins.canonical.com/bootstack/job/lp-charm-hw-health-ci/6/
Executed test runs:
    SUCCESS: https://jenkins.canonical.com/bootstack/job/lp-charm-test-functest/1230/
    None: https://jenkins.canonical.com/bootstack/job/lp-update-mp/369/

Click here to trigger a rebuild:
https://jenkins.canonical.com/bootstack/job/lp-charm-hw-health-ci/6//rebuild

review: Approve (continuous-integration)

[🤖 prod-jenkaas-bootstack (prod-jenkaas-bootstack)]

PASSED: Continuous integration, rev:4b87eaf839a0bc40576ad9c5f6b2ec5b16294d47
https://jenkins.canonical.com/bootstack/job/lp-charm-hw-health-ci/7/
Executed test runs:
    SUCCESS: https://jenkins.canonical.com/bootstack/job/lp-charm-test-functest/1231/
    None: https://jenkins.canonical.com/bootstack/job/lp-update-mp/370/

Click here to trigger a rebuild:
https://jenkins.canonical.com/bootstack/job/lp-charm-hw-health-ci/7//rebuild

review: Approve (continuous-integration)

[Robert Gildein (rgildein)]

review: Approve

[🤖 Canonical IS Merge Bot (canonical-is-mergebot)]

Change successfully merged at revision 21c8e0d325f3c94ebd115eac0481a30dfa6d33bc

diff --git a/src/metadata.yaml b/src/metadata.yaml
index 9cb28d5..6aa6768 100644
--- a/src/metadata.yaml
+++ b/src/metadata.yaml
@@ -1,7 +1,13 @@
 name: hw-health
 summary: Hardware Monitoring for Nagios
+docs: https://discourse.charmhub.io/t/hw-health-docs-index/11088
 maintainer: Llama (LMA) Charmers <[e-mail]>
 description: |
+  <DEPRECATION NOTICE>
+  This charm is no longer being actively maintained.
+  Please consider using the new hardware-observer-operator instead 
+  (https://github.com/canonical/hardware-observer-operator).
+
   This addon installs hardware monitoring tools and configures Nagios checks
   for the system hardware and storage monitoring.