add github issue templates

.github/ISSUE_TEMPLATE/bug-report.md

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+---
+name: Bug report
+about: Report a bug for this project
+title: "[Bug] "
+labels: 'bug'
+---
+
+**SailfishOS VERSION** (Settings → About product → Build): ***`<a.b.c.p>`***
+<br />**HARDWARE** (Settings → About product → Manufacturer & Product name): ***\<Manufacturer\>, \<Product name\>***
+<br />**App VERSION** (Rainviewer → [Top pulley] About): ***`<x.y.z>`***
+<br />
+
+#### BUG DESCRIPTION
+*\<A comprehensive description of this bug.  Please do report only a single bug in each bug report!\>*
+
+#### STEPS TO REPRODUCE
+1. *\<foo\>*
+2. *\<bar\>*
+3. *\<foobar\>*
+
+#### ADDITIONAL INFORMATION
+*\<Please consider which other pieces of information may be relevant: Denote if this is not always reproducible, if this is a regression (then name to which older version), attach relevant data such as log files or the systemd journal, provide screenshots etc.\>*
+

.github/ISSUE_TEMPLATE/help-form.md

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+---
+name: Help form
+about: Questions about this project
+title: "[Help] "
+labels: 'question'
+---
+
+**SailfishOS VERSION** (Settings → About product → Build): ***`<a.b.c.p>`***
+<br />**HARDWARE** (Settings → About product → Manufacturer & Product name): ***\<Manufacturer\>, \<Product name\>***
+<br />**App VERSION** (Rainviewer → [Top pulley] About): ***`<x.y.z>`***
+<br />
+
+#### QUESTION
+*\<A concisely phrased question.  Please do ask only a single question in each help request!\>*
+
+#### STEPS TO REPRODUCE
+1. *\<foo\>*
+2. *\<bar\>*
+3. *\<foobar\>*
+
+#### ADDITIONAL INFORMATION
+*\<Please consider which other pieces of information may be relevant: Attach relevant data, provide screenshots etc.\>*
+

.github/ISSUE_TEMPLATE/suggestion.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+title: "[Suggestion] "
+labels: 'feature request'
+---
+
+#### DESCRIPTION
+*\<A concisely phrased suggestion.  Please do pose only a single suggestion in each feature request!\>*
+
+#### ADDITIONAL INFORMATION
+*\<Please consider which other pieces of information may be relevant: Attach relevant data, provide screenshots etc.\>*
+