Updates docs related to Unicorn support removal.

Add Free tier badge to Database-related update pages.

Fix capitalization.
Wrap words in code tags.
Add words to the exceptions list.
Fix misspellings.
Whatever's required.

Replaces some shorthand words to enforce standard

Update pages with metadata info.

Changes future tense to present tense in pages that have metadata of
group: unassigned.

The notation we use to represent a note is:

```
NOTE: **Note:**
This is a note
```

This is rendered by Nanoc and presented in an alert box in the docs
site. The second `**Note:**` can be redundant, so let's remove it.

The previous URL had two drawbacks:

1. It didn't match what the title was about (`Assignments to DevOps
   Stages and Groups`, and the anchor was `#designated-technical-writers`).
2. It didn't account for the other sections, like development and API
   guidelines.

Add none/unassigned to relevant page metadata.

Related to: https://gitlab.com/gitlab-org/gitlab/-/issues/247288

Declare languages for code blocks.

Find and replace bash with shell

Finish cleaning up improper capitalization and backticks
in various remaining docs.

Signed-off-by: Rémy Coutable <remy@rymai.me>

Many code blocks are 4spaced, and they render in GitLab
without coloring as a result, even though they are
fenced with a language label. If in a list, other items
will render as being in a code block too, even if not
meant to. This fixes all these issues, and cleans up
minor white space issues in /topic, /university, /update
and /workflow docs.

This updates redirected links in integration, update, user
and workflow dirs. Should now link to final URLs to avoid
redirect hops

Now MySQL is no longer supported, we need to change the docs

Now MySQL is no longer supported, we need to change the docs

This change refactors the pgloader instructions to have
less headings and be more straightforward.

Markdown renderers find it easier to determine
where lists start and end when lists are surrounded
by new lines.

For consistency, also ensure entries in the list
are aligned when they span multipls lines.

Markdown renderers find it easier to determine
where lists start and end when lists are surrounded
by new lines.

For consistency, also ensure entries in the list
are aligned when they span multipls lines.

For the sake of consistency, removes any extraneous
consecutive blank lines from the doc suite.

For the sake of consistency, removes any extraneous
consecutive blank lines from the doc suite.

This removes a duplicated section and makes the doc consistent with CE.

[ci skip]

[ci skip]

Document how to use pgloader

Closes gitlab-ee#2799

See merge request gitlab-org/gitlab-ce!13109

Changed documentation of converting a MySQL-Database with Gitlab to a Postgresdatatabase. The instructions were missleading. See -> https://gitlab.com/gitlab-org/gitlab-ce/issues/2904

Closes #2176 (gitlab.com)