Problem:
As checkhealth grows, it is increasingly hard to quickly glance through
the information.

Solution:
Show a summary of ok, warn, and error outputs per section.

Problem: When running functional tests locally, test `syntax/shada.vim works`
fails if the local timezone is not a whole number of hours ahead of UTC.

Solution: Use '!%M' for minute format so that UTC is used in the expected
timestamp instead of the local timezone, just like '%H' for hours.

Problem:

If a config name contains "*" it causes rtp discovery of `lsp/` to
consider the `*` as a wildcard and could lead to strange and unintended
behaviour. For example, accessing the `'*'` config from a `lsp/` file
would cause an infinite loop.

Solution:

- Explicitly disallow a config name from containing wildcards, with the
  exception of `'*'`.
- When Resolving `'*'` config, skip the rtp step.

Problem:
Some language servers do not work properly without a workspace folder.

Solution:
Add `workspace_required`, which skips starting the lsp client if no
workspace folder is found.

Co-authored-by: Justin M. Keyes <justinkz@gmail.com>

Problem:
Nvim needlessly requests inlay_hints even if they are disabled for a given buffer.

Solution:
Add the missing `enabled` check in `on_refresh`.
Rest of the code has this check already so that's the only needed one to fix this.

Problem:
Health status can be much more visually distinct.

Solution:
Use emoji next to each status.

test(lsp): add some tests for LSP bugs