This PR does 4 things:
* Adds a new cmdlet `New-PSBreakpoint` which creates new `Breakpoint` objects and writes them to the pipeline
* Adds a `-Breakpoint` parameter to `Debug-Runspace` which will receive `Breakpoint` objects
* Makes the constructors for `*Breakpoint` public for use with the API
* Makes `Debugger.GetBreakpoint(string id)` and `Debugger.GetBreakpoints()` public since `SetBreakpoints` is public
Note: `New-PSBreakpoint` and `Set-PSBreakpoint` (which already exists) are similar... but `Set-PSBreakpoint` also sets the breakpoints in the _current_ runspace. This is not ideal if we want to set breakpoints in a _different runspace than the current one_.
## PR Context
The "Attach to process" debugging experience in the PowerShell extension for VSCode is _ok_ but it's not great.
The reason it's not great is due to the `BreakAll` feature of PowerShell debugging which, when you run `Debug-Runspace`, will break at the first piece of code that gets run. This is not ideal when you "Attach to process" _and then_ run your code in the other runspace.
Today, the experience drops you in `PSReadLine`'s psm1 if PSRL is available or in the vscode PowerShell helper psm1.
It's unexpected for the user and not ideal.
This PR will allow the extension to pass in the breakpoints that need to be set initially with `BreakAll` turned off for none of this silly behavior.
### Silly behavior example
If you want a repro, try this:
PowerShell instance 1:
```
Enter-PSHostProcess -Id $otherprocesspid
Debug-Runspace 1
```
PowerShell instance 2:
```
./runfoo.ps1
```
Note that you end up NOT `runfoo.ps1`
Adds an optional -Depth parameter to the cmdlet which lets the user to specify a maximum depth allowed for deserialization, which will overwrite the default maximum of 1024.
Instantiating a new MediaTypeHeaderValue object fails when the -ContentType parameter includes a charset such as application/json; charset=utf-8. This makes it impossible to set the content encoding on web requests. Moving to Parse() ensures we actually get a proper MediaTypeHeaderValue when the charset is present, thus allowing users to set their request encoding via proper -ContentType values.
Web Cmdlets will no longer forcibly remove Expect: 100-continue from web requests.
This was a legacy setting that needed to be there because of platform differences that have since been resolved in CoreFX.
* support fuzzy matching with get-command and on CommandNotFound exception, show suggestion
* fix CodeFactor issues
* change algorithm to use Damerau-Levenshtein Distance which is more useful in finding close matches
Aditya Patwardhan