ci: lint markdown files (open-telemetry#1147)

* ci: add markdown linting

Signed-off-by: Naseem <naseem@transit.app>

* fix: lint markdown files

Signed-off-by: Naseem <naseem@transit.app>

* docs: add markdown lint configuration

Signed-off-by: Naseem <naseem@transit.app>

* docs: lint change log

Signed-off-by: Naseem <naseem@transit.app>

api/.markdownlint.json

@@ -0,0 +1,6 @@
+{
+  "MD013": false,
+  "MD024": false,
+  "MD033": false,
+  "MD041": false
+}

api/README.md

@@ -1,4 +1,5 @@
 # OpenTelemetry API for JavaScript
+
 [![Gitter chat][gitter-image]][gitter-url]
 [![NPM Published Version][npm-img]][npm-url]
 [![dependencies][dependencies-image]][dependencies-url]
@@ -99,6 +100,7 @@ api.metrics.setGlobalMeterProvider(meterProvider);
 Because the npm installer and node module resolution algorithm could potentially allow two or more copies of any given package to exist within the same `node_modules` structure, the OpenTelemetry API takes advantage of a variable on the `global` object to store the global API. When an API method in the API package is called, it checks if this `global` API exists and proxies calls to it if and only if it is a compatible API version. This means if a package has a dependency on an OpenTelemetry API version which is not compatible with the API used by the end user, the package will receive a no-op implementation of the API.
 
 ## Advanced Use
+
 ### API Registration Options
 
 If you prefer to choose your own propagator or context manager, you may pass an options object into the `tracerProvider.register()` method. Omitted or `undefined` options will be replaced by a default value and `null` values will be skipped.
@@ -176,6 +178,7 @@ async function doSomething() {
 ```
 
 ## Useful links
+
 - For more information on OpenTelemetry, visit: <https://opentelemetry.io/>
 - For more about OpenTelemetry JavaScript: <https://github.com/open-telemetry/opentelemetry-js>
 - For help or feedback on this project, join us on [gitter][gitter-url]

api/packages/opentelemetry-context-base/README.md

@@ -1,4 +1,5 @@
 # OpenTelemetry Base Context Manager
+
 [![Gitter chat][gitter-image]][gitter-url]
 [![NPM Published Version][npm-img]][npm-url]
 [![dependencies][dependencies-image]][dependencies-url]
@@ -7,7 +8,7 @@
 
 This package provides the ContextManager interface (which is used by concrete implementations) and a no-op implementation (which is used internally when no context propagation is defined). It's intended for use both on the server and in the browser.
 
-## What is a Context Manager ?
+## What is a Context Manager
 
 To understand why they exists, we'll need to understand how Javascript works: when you make native function call (networks, setInterval etc) you generally call C++ code that will later callback your own code.
 
@@ -18,6 +19,7 @@ ContextManager's aim to offer exactly that, it's API offer to store an object in
 This package only include the interface and a Noop implementation, for more information please see the [async-hooks based ContextManager][ah-context-manager] for NodeJS.
 
 ## Useful links
+
 - For more information on OpenTelemetry, visit: <https://opentelemetry.io/>
 - For more about OpenTelemetry JavaScript: <https://github.com/open-telemetry/opentelemetry-js>
 - For help or feedback on this project, join us on [gitter][gitter-url]