adds CI (#6)

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: File a bug report
+labels: bug
+
+---
+
+<!-- Thank you for submitting a bug report! All fields are required unless marked optional. -->
+
+## Steps to reproduce
+<!-- Please enable debug logging by running `juju model-config logging-config="<root>=INFO;unit=DEBUG"` (if possible) -->
+1.
+
+## Expected behavior
+
+## Actual behavior
+<!-- If applicable, add screenshots -->
+
+## Versions
+
+<!-- Run `lsb_release -sd` -->
+Operating system:
+
+<!-- Run `juju version` -->
+Juju CLI:
+
+<!-- Model version from `juju status` -->
+Juju agent:
+
+<!-- App revision from `juju status` or (advanced) commit hash -->
+Charm revision:
+
+## Log output
+<!-- Please enable debug logging by running `juju model-config logging-config="<root>=INFO;unit=DEBUG"` (if possible) -->
+<!-- Then, run `juju debug-log --replay > log.txt` and upload "log.txt" file here -->
+Juju debug log:
+
+<!-- (Optional) Copy the logs that are relevant to the bug & paste inside triple backticks below -->
+
+
+## Additional context
+<!-- (Optional) Add any additional information here -->

.github/workflows/ci.yaml

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+# Copyright 2024 Canonical Ltd.
+# See LICENSE file for licensing details.
+name: Unit testing
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    # Run checks on reopened draft PRs to support triggering PR checks on draft PRs that were opened
+    # by other workflows.
+    types: [opened, synchronize, reopened, ready_for_review]
+
+jobs:
+  maas-agent-charm:
+    name: MAAS Agent unit test
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    defaults:
+      run:
+        working-directory: ./maas-agent-charm
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Install tox
+        run: |
+          pipx install tox
+      - name: Run linter
+        run: tox run -e lint
+      - name: Run static checks
+        run: tox run -e static
+      - name: Run tests
+        run: tox run -e unit
+
+  maas-region-charm:
+    name: MAAS region unit test
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    defaults:
+      run:
+        working-directory: ./maas-region-charm
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Install tox
+        run: |
+          pipx install tox
+      - name: Run linter
+        run: tox run -e lint
+      - name: Run static checks
+        run: tox run -e static
+      - name: Run tests
+        run: tox run -e unit