Improve runtime calls generation

Use tera templates to render documentation.

added C-doc RN-silent labels

requested review from @tuxmain

assigned to @HugoTrentesaux

The old template was using <details> a lot, meaning user had to click to see the documentation. In the new template, <details> is only used to reveal the typing of the extrinsic arguments.

• old: https://git.duniter.org/nodes/rust/duniter-v2s/-/blob/3b84a169fee2085f3ef947b5d530b2cc99499559/docs/api/runtime-calls.md
• new: https://git.duniter.org/nodes/rust/duniter-v2s/-/blob/f8956c8f1f1b54cf7717e552c851e3fcf16a703e/docs/api/runtime-calls.md

In addition of being more readable straight in GitLab, it is better integrated in the duniter.org website.

added 1 commit

• 3ff877d4 - run `xtask gen-calls-doc`

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Example of integration: https://duniter.org/wiki/duniter-v2/runtime-calls/ (using the doc generated un this MR)

added 1 commit

• 400e495b - fix broken markdown

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added 2 commits

• 24379e10 - fix broken markdown
• 3b312c86 - remote to_vec

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added 1 commit

• f57be04d - review: disabled calls description

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resolved all threads

approved this merge request

added 11 commits

• f57be04d...585d5807 - 6 commits from branch master
• 94ff6ed1 - use tera templates to generate runtime calls doc
• 22a45539 - run `xtask gen-calls-doc`
• 23b0f2b2 - fix broken markdown
• 2db7d142 - remote to_vec
• 3758c061 - review: disabled calls description

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enabled an automatic merge when the pipeline for 3758c061 succeeds

mentioned in commit 09d5fb57

merged