Add YARA docs, also add in missing Post request issue (#364)

Added the new YARA issue I am trying to introduce, as well as a
corresponding analytics summary page. This closes half of
[SAI-1325](https://veracode.atlassian.net/browse/SAI-1325). The other
half of the work is with the docs team.

Author: antfie

docs/analytics/yara.md

@@ -0,0 +1,13 @@
+# Yara
+
+## Description
+
+YARA issues occur when patterns in code or binary files match known malicious signatures or suspicious behaviours. YARA (Yet Another Recursive Acronym) is a pattern-matching tool used to identify and classify malware based on textual or binary patterns. When a package triggers a YARA rule, it indicates the presence of code that resembles known threats, obfuscation techniques, or other suspicious characteristics commonly found in malicious software.
+
+## Importance
+
+A YARA rule issue is a strong indicator that a package may contain malicious code or exhibit behaviours associated with malware.
+
+## Examples
+
+YARA rules have been instrumental in detecting malicious packages across open-source ecosystems. In August 2021, security researchers identified a malicious NPM package called ua-parser-js that had been compromised. YARA rules detected the presence of cryptocurrency mining malware and password-stealing trojans embedded in the package. The malicious version was downloaded over a million times before being removed, affecting numerous production systems. The YARA signatures matched patterns commonly found in cryptominers and credential harvesters, triggering immediate alerts that led to the package's investigation and eventual removal.

docs/knowledge_base/issue_tags.md

@@ -60,6 +60,8 @@ Phylum uses tags to uniquely identify issues raised by the system. These tags ca
 | CE0046 | [Deprecated Package](../analytics/deprecated_package.md) | Package has been deprecated |
 | IM0047 | [Python Build Hook](../analytics/python_build_hook.md) | Package contains Python build hook files |
 | IL0050 | [License](../analytics/license_source_code_distribution.md) | License requires source code distribution |
+| IM0051 | Post Request | Package contains code that makes a POST request |
+| .M0052 | [YARA](../analytics/yara.md) | Package contains files that were flagged by YARA rules |
 | HM0099 | [Basic Javascript Obfuscation](../analytics/obfuscated_javascript.md) | Package contains obfuscated Javascript |
 | IE1001 | Unmaintained | Package has been marked as unmaintained by [RustSec](https://rustsec.org/) |
 | CM1002 | Malware (via OSSF MAL) | Determined to be malware by contributors to the OpenSSF malicious packages project |