Add linking for message editing

Solves #11

v1.2.0: Improved issue pattern for linker

Fixes #5

v1.1.0: Add ability to link issues in attachment text

Solves #3:

It can be useful for messages from SCM webhooks with commit messages (messages can contain meta with issue reference).

v1.0.6: Fix ignoring of max search attempts property

Fixes #2

Add limit for issues search attempts

Added property to limit issues regexp matches (default: 25)

Resolved: #1

Add exclude pattern for tilde code block

Avoid linkink for tilde code block:

~~~
TEST-123
~~~

Add exclude patterns for links and code blocks

Add exclude patterns to avoid broken text for:

• links like https://youtrack.example.com/issue/EXAMPLE-12
• markdown code blocks inside quotes