add badges to README and CONTRIBUTING (#40)

Author: lucabello

CONTRIBUTING.md

@@ -1,5 +1,13 @@
 # Contributing to observability-libs
 
+![GitHub License](https://img.shields.io/github/license/canonical/observability-libs)
+![GitHub Commit Activity](https://img.shields.io/github/commit-activity/y/canonical/observability-libs)
+![GitHub Lines of Code](https://img.shields.io/tokei/lines/github/canonical/observability-libs)
+![GitHub Issues](https://img.shields.io/github/issues/canonical/observability-libs)
+![GitHub PRs](https://img.shields.io/github/issues-pr/canonical/observability-libs)
+![GitHub Contributors](https://img.shields.io/github/contributors/canonical/observability-libs)
+![GitHub Watchers](https://img.shields.io/github/watchers/canonical/observability-libs?style=social)
+
 ## Bugs and pull requests
 
 - Generally, before developing enhancements to this charm, you should consider explaining your use

README.md

@@ -1,5 +1,8 @@
 # Observability Libs
 
+[![Release Libraries](https://github.com/canonical/observability-libs/actions/workflows/release-libs.yaml/badge.svg)](https://github.com/canonical/observability-libs/actions/workflows/release-libs.yaml)
+[![Discourse Status](https://img.shields.io/discourse/status?server=https%3A%2F%2Fdiscourse.charmhub.io&style=flat&label=CharmHub%20Discourse)](https://discourse.charmhub.io)
+
 ## Description
 
 Observability Libs is a placeholder charm that is used to provide a home for [charm libraries] that

tox.ini

@@ -72,10 +72,7 @@ deps =
 commands =
     charm: mypy {[vars]src_path} {posargs}
     lib: mypy --python-version 3.8 {[vars]lib_path}/v0 {posargs}
-    lib: /usr/bin/env sh -c 'for m in $(git diff main --name-only {[vars]lib_path}); do \
-    lib:    if ! git diff $m | grep -q "+LIBPATCH\|+LIBAPI"; then \
-    lib:        echo "You forgot to bump the version on $m!"; exit 1; \
-    lib:    fi; done'
+    lib: /usr/bin/env sh -c 'for m in $(git diff main --name-only {[vars]lib_path}); do if ! git diff main $m | grep -q "+LIBPATCH\|+LIBAPI"; then echo "You forgot to bump the version on $m!"; exit 1; fi; done'
     unit: mypy {[vars]tst_path}/unit {posargs}
     integration: mypy {[vars]tst_path}/integration {posargs}
 allowlist_externals = /usr/bin/env