Streamline counter, wCCD and voting smart contract tutorials

[Victor-N-Suadicani]

Purpose

Streamline and update the tutorials to make them simpler and easier to follow.

Changes

• Rewrote counter tutorial to improve the wording and simplify the code.
  • Many subpar VSCode screenshots that felt unnecessary were removed.
  • The code was simplified to use a single update function rather than separate increment and decrement functions. A single error variant OverflowError is used instead of separate errors for the two previous functions.
  • Added instructions for how to use Concordium's testnet node to go through the tutorial, which makes it much easier to follow.
• Slightly edited the wCCD tutorial, including merging the last part with the previous part since it is so short.
• Some cleaning up for the voting tutorial, including making it adhere to the new simplified version, see Simplify voting example and default template concordium-rust-smart-contracts#440.
• Removed some redundant/repeated sections in the piggybank tutorial and elsewhere.

Checklist

• My code follows the style of this project.
• The code compiles without warnings.
• I have performed a self-review of the changes.
• I have documented my code, in particular the intent of the
  hard-to-understand areas.
• (If necessary) I have updated the CHANGELOG.

[github-actions]

PR Preview Action v1.4.7
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2024-07-30 07:23 UTC