Add serial monitor send/receive encoding options

[AhmedSalihCezayir]

• Add "send as " dropdown menu.
• Add "receive as " dropdown menu.

Sending and receiving can be done in any encoding specified in StandardCharsets with the additional option to send comma-separated bytes and receive newline-separated bytes directly.

This fixes arduino/arduino-ide#1728 and offers an easy implementation for issue arduino/arduino-ide#1727.

[chid-bot]

IMPACT GRAPH

🟡 MODIFIED 🔴 REMOVED 🔵 POSSIBLY AFFECTED

📝 GENERAL INFORMATION

• Number of Changed Code Files in This Pull Request 👉 4
• Total Added Lines 👉 284
• Total Deleted Lines 👉 187

📂 METRICS

Metric	Category	Numeric Value
Highly Buggy File Ratio	🟧 D	50.00%
Highly Code Churned File Ratio	🟨 C	50.00%
Pr Size	🟧 D	471
Impact Size	🟦 B	0.21%
RISK*	🟨 C	54.38%

*Risk is calculated as weighted sum of above metrics

Category Scala => Best: 🟩 A | Good: 🟦 B | Mediocre: 🟨 C | Bad: 🟧 D | Worst: 🟥 E

ℹ️ 💁 AUTHOR INFORMATION

• The current status of the Ahmed Salih Cezayir is:
• Current Pull Request Count 👉 3
• Current Merged Pull Request Count 👉 0
• Author Merge Rate Result 👉 0.00%

🌞 🌚 CO-CHANGE FILES INFORMATION

Missing Sibling Files of SerialMonitor.java	Co Changed Ratio	Co-Changed Count	PR Count of SerialMonitor.java
app/src/processing/app/AbstractMonitor.java	50.00%	3	6
app/src/processing/app/Editor.java	50.00%	3	6
app/src/processing/app/NetworkMonitor.java	50.00%	3	6

🏆 QUALITY GATE

CONDITIONS

❌ Risk score should be lower than 40%
❌ Highly buggy file ratio should be lower than 20%
❌ Highly churn file ratio should be lower than 25%
❌ Pull request size should be lower than 400 lines of code

❗ POSSIBLE RISKY FILES

File Name	Bug Frequency
SerialMonitor.java	50%
Serial.java	75%

File Name	Current Code Churn
SerialMonitor.java	7.30
Serial.java	5.26

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