Added github, HACS files

Signed-off-by: Iván Sánchez Ortega <ivan@sanchezortega.es>

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false
+contact_links:
+  - name: GitLab bug tracker
+    url: https://gitlab.com/IvanSanchez/homeassistant-sensorthings/-/issues
+    about: >
+      Development of `homeassistant-sensorthings` happens mostly on Git**Lab**, not
+      Git**Hub**. If you wish to report a problem, please do so in the issue
+      tracker at the GitLab repository.

.github/workflows/hacs.yml

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+name: HACS Action
+
+on:
+  push:
+  pull_request:
+  schedule:
+    - cron: "0 0 * * *"
+
+jobs:
+  hacs:
+    name: HACS Action
+    runs-on: "ubuntu-latest"
+    steps:
+      - name: HACS Action
+        uses: "hacs/action@main"
+        with:
+          category: "integration"

.github/workflows/hassfest.yml

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+name: Validate with hassfest
+
+on:
+  push:
+  pull_request:
+  schedule:
+    - cron: "0 0 * * *"
+
+jobs:
+  validate:
+    runs-on: "ubuntu-latest"
+    steps:
+      - uses: "actions/checkout@v3"
+      - uses: home-assistant/actions/hassfest@master

hacs.json

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+{
+  "name": "OGC SensorThings"
+}

info.md

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+
+Client for [OGC SensorThings](https://ogcapi.ogc.org/sensorthings/) services.
+
+
+See https://github.com/IvanSanchez/homeassistant-sensorthings for more info