[EngAut]: Tip Bot Improvements

[mordamax]

Goal: To improve the user-experience when tipping or receiving tips for contributions.

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Tasks

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1. openGov support #39
   +0
   
2. Update Polkadot to use OpenGov #86
   +0
   
3. Add Topic & Description to post (polkassembly) for OpenGov proposal #62
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4. Store tip metadata through set_metadata instead of a remark #74
   5 of 5
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5. Add tests for opengov & preimage size #65
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6. Clean up preimages after referendum is complete #73
   +0
7. Inline preimages (if possible) #76
   +0
   
8. Recover from connection drops #11
   bug +1
   
9. Feedback after an internal demo #54
   +0
   
10. Run the integration tests on CI #84
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11. Polkassembly integration improvements #85
    +0
    
12. Notify about a Tip in tip-bot matrix channel #69
    +0