reuse: add copyright + license info to individual docs/*.md files

Instead of use 'docs/*.md' in dep5. For clarity and avoiding a wide-
matching wildcard.

+ Remove mention of old

reuse: add copyright + license info to individual docs/*.md files

Instead of use 'docs/*.md' in dep5. For clarity and avoiding a wide-
matching wildcard.

+ Remove mention of old files from .reuse/dep5
+ add info to .github/dependabot.yml
+ make scripts/copyright.pl warn on non-matching patterns

Closes #13245

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docs: use present tense

avoid "will", detect "will" as a bad word in the CI

Also line wrapped a bunch of paragraphs

Closes #13001

docs: do not start lines/sentences with So, But nor And

Closes #12802

docs: minor grammar fixes

Closes #9609

docs: spellfixes

Pointed by the new CI job

docs: grammar proofread, typo fixes

(Partially automated) proofread of most of the documentation, leading to
various typo fixes.

Closes #8353

docs: address proselint nits

- avoid exclamation marks
- use consistent number of spaces after periods: one
- avoid clichés
- avoid using 'very'

Closes #8060

docs: reduce/avoid English contractions

You're => You are
Hasn't => Has not
Doesn't => Does not
Don't => Do not
You'll => You will
etc

Closes #7930

docs: fix typos in NEW-PROTOCOL.md

This fixes a misspelled "it" and a grammatically wrong "-ing" suffix.

Closes #6471

NEW-PROTOCOL: document what needs to be done to add one

Closes #6263