* chore: manifests with configuring prometheus operator
Signed-off-by: STRRL <str_ruiling@outlook.com>

* chore:ignore manifests with lincense checker
Signed-off-by: STRRL <str_ruiling@outlook.com>

* chore: make check
Signed-off-by: STRRL <str_ruiling@outlook.com>

* chore: manifests about prom kubernetes service discovery
Signed-off-by: STRRL <str_ruiling@outlook.com>

* chore: readme for monitoring
Signed-off-by: STRRL <str_ruiling@outlook.com>

* chore: make check
Signed-off-by: STRRL <str_ruiling@outlook.com>

* chore: update CHANGELOG
Signed-off-by: STRRL <im@strrl.dev>
Co-authored-by: Ti Chi Robot <ti-community-prow-bot@tidb.io>