rpicam-{hello,jpeg,raw,still,vid}: add page

[MIfoodie]

• The page(s) are in the correct platform directories: common, linux, osx, windows, sunos, android, etc.
• The page(s) have at most 8 examples.
• The page description(s) have links to documentation or a homepage.
• The page(s) follow the content guidelines.
• The PR title conforms to the recommended templates.
• Version of the command being documented (if known):

The version of the command being documented is the latest version.

[gutjuri]

Thanks for your contribution, I have added some comments. However, we usually put pages for different commands into different files. I think that it would be better if you created one file for rpicam-hello, one for rpicam-jpeg and so on :)

[MIfoodie]

Thanks for your contribution, I have added some comments. However, we usually put pages for different commands into different files. I think that it would be better if you created one file for rpicam-hello, one for rpicam-jpeg and so on :)

Ok sorry. First PR I was expecting there to be some problems :)

(I probably won't get to this tonight though it definitely will be completed by tomorrow)

[vitorhcl]

Thanks for your contribution! I have suggested some changes:

• If the value is already provided in the description, please don't use a placeholder, but rather leave it as part of the command. From the contributing guide:

However, if the description suggests a specific value, leave it as part of the command, and not as a placeholder, for example:

- Display records more recent than 3 days:

`lastlog --time 3`

• Fix the path placeholder syntax. See the style guide:

Paths

• Use {{filename}} when just the file name is expected.
• For any reference to paths of files or directories,
  use the format {{path/to/<placeholder>}},
  except when the location is implicit.
• When the path cannot be relative,
  but has to start at the root of the filesystem,
  prefix it with a slash,
  such as get {{/path/to/remote_file}}.
• In case of a possible reference both to a file or a directory,
  use {{path/to/file_or_directory}}.

[gutjuri]

Thanks for incorporating my feedback!

[MIfoodie]

Applied your changes except for one which I had to resolve...

[vitorhcl]

LGTM, thanks for your contribution!

[sebastiaanspeck]

Suggested change

	`rpicam-still -o name/of/file.jpg --shutter {{100000000}}`
	`rpicam-still -o name/of/file.jpg --shutter {{100000}}`

As far as I know, 100 seconds is 100000 milliseconds

[kbdharun]

Welcome to tldr and thanks for your contribution.

LGTM, after @sebastiaanspeck's suggestions.